Latest / Stuff You Should Know / How Wildfires Work
Transcript
- 0:00Speaker 1: Brought to you by the reinvented two thousand twelve camera.
- 0:03Speaker 1: It's ready. Are you welcome to Stuff you should know
- 0:08Speaker 1: from House Stuff Works dot Com? Hey, and welcome to
- 0:16Speaker 1: the podcast. I'm Josh Clark. There's Charles W. Chuck Bryant
- 0:22Speaker 1: right over there, and this is stuff you should not
- 0:26Speaker 1: That was my Shatner. I told you I worked with him,
- 0:30Speaker 1: I think on a podcast. Right. He was puffy and
- 0:33Speaker 1: stuff in a suit. He's nice though, right, he was
- 0:36Speaker 1: super nice. And heck I uh, every time I'm wearing
- 0:40Speaker 1: wear a suit, I'm puffy and stuff in a suit.
- 0:42Speaker 1: So I'm poured into my suits, poured in liquid. That's great. So,
- 0:50Speaker 1: and that's absolutely not true, by the way, Chuck. Yes, Um,
- 0:55Speaker 1: I have a couple of stories for you. I have
- 0:57Speaker 1: a specific story for you. But you have this too, right,
- 1:01Speaker 1: did I give you this? Okay? So? Um? In uh
- 1:06Speaker 1: two thousand two right, there is a guy who worked
- 1:10Speaker 1: for the Bureau of Indian Affairs and he was a
- 1:13Speaker 1: firefighter for them. Right, he went onto the Arizona Apache
- 1:19Speaker 1: Reservation and he started a wildfire intentionally. So he's an arsonist. Yes,
- 1:27Speaker 1: he's not an arsonist for fun or because he's crazy,
- 1:30Speaker 1: Um or what was it? Uh? He was curious, highly curious.
- 1:34Speaker 1: Remember that was a trade, that was trade curiosity setting fires. Um.
- 1:40Speaker 1: He wanted to work, right, Leonard greg Leonard greg was
- 1:44Speaker 1: his name. Um, he uh set this fire and unbeknownst
- 1:50Speaker 1: to him, at the same time you do. There's a woman,
- 1:54Speaker 1: um who had run out of gas not too far away, right, um,
- 2:00Speaker 1: and she saw that there was a news helicopter covering
- 2:04Speaker 1: the fire that Leonard greg had just said. She didn't
- 2:06Speaker 1: know about either, but she didn't feel like walking, or
- 2:09Speaker 1: she felt like she couldn't walk, so she set a
- 2:11Speaker 1: fire to try to get the attention of the news
- 2:15Speaker 1: helicopter so it would come rescue her so she didn't
- 2:18Speaker 1: have to walk to go get gas. That's pretty amazingly awful. So, UM,
- 2:22Speaker 1: I guess her last name was chet is Key. Because
- 2:27Speaker 1: the Rodeo Fire, which is what they called the fire
- 2:31Speaker 1: that Leonard Gregg started, collided with the Chetisky fire, and um,
- 2:37Speaker 1: it was a conflagration. Ultimately four hundred and sixty seven
- 2:42Speaker 1: thousand acres burned, including four and it was the largest
- 2:48Speaker 1: fire in Arizona's history. And this is two thou So Greg,
- 2:51Speaker 1: I don't know what happened to the woman, but Greg
- 2:54Speaker 1: was found guilty of arson since the ten years in
- 2:57Speaker 1: order to pay twenty eight million dollars, which as an
- 3:00Speaker 1: occasional firefighter for the Bureau of Indian Affairs, I would
- 3:02Speaker 1: imagine he didn't have. Yeah, when that never happens. You
- 3:05Speaker 1: always see that, like their awards so and so this,
- 3:07Speaker 1: and they just don't pay. It's just like a symbolic award.
- 3:11Speaker 1: I guess you'll know you'll never make more than your
- 3:14Speaker 1: wages again kind of thing. Yeah, but what's crazy is
- 3:18Speaker 1: not just that this lady set this fire because she
- 3:21Speaker 1: wanted to get the attention of a news copter, or
- 3:24Speaker 1: that this guy set a fire because of a desire
- 3:28Speaker 1: to get work to put the fire out, but because
- 3:32Speaker 1: they're not the only people who have done stupid stuff
- 3:35Speaker 1: like this. They follow in a long, grand tradition of
- 3:38Speaker 1: people who have set wildfires for all sorts of different reasons,
- 3:43Speaker 1: and a lot of them to get work. Yeah, you
- 3:46Speaker 1: have a list here, And of course we're not we're
- 3:48Speaker 1: going to praise the firefighters, not like we're saying a
- 3:50Speaker 1: lot of these firefighters starting fires. But it does happen
- 3:52Speaker 1: more than you would think. I I imagine we'll probably
- 3:56Speaker 1: throw some more out later on. But first, chuckers, right,
- 4:00Speaker 1: let's get to wildfires, how they work, what affects them.
- 4:06Speaker 1: The fire triangle. Yeah, we should probably start with the
- 4:09Speaker 1: fire triangle because it relates to not just forest fires
- 4:15Speaker 1: or wildfires, but all fires. All fire, Josh requires three things.
- 4:21Speaker 1: Um fuel obviously to burn air, to get oxygen to
- 4:25Speaker 1: the fire, because we know that, we all knows, we
- 4:28Speaker 1: all know that makes the fire burn hotter and bigger.
- 4:31Speaker 1: And then the heat source to bring the fuel to
- 4:34Speaker 1: the ignition temperature to begin with. And they call that
- 4:37Speaker 1: the fire triangle. And the goal of a wild firefighter
- 4:42Speaker 1: and or I guess probably more so a wild firefighter
- 4:45Speaker 1: is to remove one of those three components from the
- 4:48Speaker 1: scene and that will give them a better chance of
- 4:51Speaker 1: extinguishing the fire. Yeah, if you can bring the temperature down,
- 4:54Speaker 1: or starve the fire of oxygen something or get rid
- 4:57Speaker 1: of the fuel, right, yeah, all three those things have
- 5:00Speaker 1: to exist. And the reason why, like if you look
- 5:03Speaker 1: at wood as a fuel would as it pertains to fire,
- 5:07Speaker 1: is just a um solid store of hydrocarbons that are
- 5:11Speaker 1: released when the wood is heated to the flash point,
- 5:14Speaker 1: to the flash point. Um, and those hydrocarbons at the
- 5:17Speaker 1: flash point bind with oxygen in the air and it
- 5:21Speaker 1: can busts thanks to the spark, thanks to the heat. Yeah,
- 5:25Speaker 1: and the flash point. Everything has a flash point. Apparently
- 5:27Speaker 1: everything will burst into flames at some point, like a
- 5:30Speaker 1: fahrenhyp four one is supposed to be the flash point
- 5:33Speaker 1: of books. Yes, right, yes, which is very cool. Title
- 5:36Speaker 1: woods flash point is um five hundred and seventy seventy
- 5:40Speaker 1: two degrees fahrenheit three D if you're into celsius, if
- 5:45Speaker 1: you're that kind of thing, and uh, that's when would
- 5:49Speaker 1: will burst into flames. Yes. Um. I've got a couple
- 5:52Speaker 1: of just quick stats here about five million acres of
- 5:56Speaker 1: woodland burn every year in the United States, and I
- 5:59Speaker 1: got a different set. It was one point two million.
- 6:01Speaker 1: But then I looked I saw that that stato. Yeah,
- 6:03Speaker 1: I looked at the past decade five point nine million,
- 6:07Speaker 1: five point to nine point three nine point eight eight
- 6:09Speaker 1: point six eight four or seven three and seven. So
- 6:12Speaker 1: that's about five So I trust that one. And that
- 6:15Speaker 1: is dude. In two thousand nine, I'm sorry, let's go
- 6:18Speaker 1: to two thousand and six. There were ninety six thousand,
- 6:22Speaker 1: three five fires, wildfires in the US. It's a lot
- 6:26Speaker 1: of wildfires, isn't it crazy? And what's crazy is that
- 6:29Speaker 1: four fits of those are started by human activity. Yeah,
- 6:34Speaker 1: a little more than four fasts And that's nuts. Like,
- 6:36Speaker 1: I mean, there's a whole thing called lightning season, right
- 6:40Speaker 1: that when combined with this, um, this type of weather
- 6:43Speaker 1: called fire weather, which is very very dry, maybe drought
- 6:46Speaker 1: like conditions, um during warm summer months when it's very
- 6:50Speaker 1: hot out. Um. And all it takes is like apparently
- 6:54Speaker 1: like a train wheel causing a spark off of off
- 6:58Speaker 1: of the rail into some tinder and then bam, you've
- 7:00Speaker 1: got a wildfire. Um. But even all those uh don't
- 7:07Speaker 1: account for more than a fifth of wildfires. The rest
- 7:10Speaker 1: are like people throwing cigarettes out or looking for work
- 7:13Speaker 1: as firefighters, or not putting out their fire when they're camping. Yes,
- 7:17Speaker 1: that's a big one to UM. I have another couple
- 7:19Speaker 1: of stats from FEMA. There are total there are a
- 7:23Speaker 1: hundred and seventies six thousand intentionally set outdoor fires every
- 7:28Speaker 1: year in the United States. And a lot of those
- 7:31Speaker 1: I think, uh, they're prescribed burns. Right. No, no, no,
- 7:35Speaker 1: that that's like people. Yeah, but it's uh only you
- 7:40Speaker 1: know a certain amount of those are wild I think
- 7:41Speaker 1: sixty three are outdoor fires vegetation fires. So the others
- 7:46Speaker 1: are like trash fires, rubbish fires. Yeah, exactly, all of
- 7:52Speaker 1: them make smoky the bear weep. Yeah. True. So, um,
- 7:58Speaker 1: there's fire weather, there's lightning season. Four fifths the fires
- 8:02Speaker 1: are started by humans, more than four fifths, he said.
- 8:05Speaker 1: We know about the fire triangle, right, So once combustion
- 8:10Speaker 1: is started from whatever the sources, there's a lot of factors.
- 8:15Speaker 1: Oh no, not necessarily. There's three large factors that combine too.
- 8:21Speaker 1: I guess give us an idea of what's going to
- 8:24Speaker 1: happen with this forest fire right now? Are these are these?
- 8:27Speaker 1: Fuel characteristics are like how facet will spread? No, it's fuel, weather,
- 8:31Speaker 1: and topography. Those are the big three. And then each
- 8:34Speaker 1: of those kind of has a few subcategories. But the
- 8:37Speaker 1: but fuel, the amount of the type of fuel, the
- 8:40Speaker 1: the type of weather that that's going on, like is
- 8:43Speaker 1: it fire weather is it not? And then topography the
- 8:46Speaker 1: lay of the land like if it's a lake, that's
- 8:50Speaker 1: not good topography for a forest fire. And I'm going
- 8:53Speaker 1: to use forest fire and wildfire interchangeably. I didn't see
- 8:56Speaker 1: anything that said that they're not one and the same.
- 8:58Speaker 1: Well they are today at least forest fire just kind
- 9:00Speaker 1: of rolls off the tongue a little more for me. Yeah,
- 9:03Speaker 1: my thick tongue. Law said wildfire, And I keep saying
- 9:06Speaker 1: wildflower to Jerry? Is it wildflower or wide fire? What
- 9:11Speaker 1: wide fire gonna go? Forest fire? It could be a
- 9:14Speaker 1: wide fires. Uh so fuel Uh, you need a fuel
- 9:19Speaker 1: obviously to get the wildfire burning. In what they call
- 9:24Speaker 1: the they call it a fuel load is the amount
- 9:27Speaker 1: and it's a measured amount of fuel available per unit
- 9:31Speaker 1: area and it's usually tons per acre. So they there
- 9:35Speaker 1: they can actually they're good enough to guestimate that like
- 9:37Speaker 1: the biomass of like all this dry grass. Yeah, like
- 9:40Speaker 1: they know, like, man, this is gonna be a bad
- 9:41Speaker 1: one because we've got to you know, I don't have
- 9:43Speaker 1: any numbers, but whatever fuel load in this area of
- 9:46Speaker 1: the Colorado National Forest. And what's interesting is is, um
- 9:50Speaker 1: you would think that the fuel load, if you do
- 9:53Speaker 1: it in weight, because it's tons per acre, right, that
- 9:56Speaker 1: depending on the type of fuel, like if it's grass,
- 10:00Speaker 1: if it's lighter, that it's going to burn more quickly
- 10:03Speaker 1: because it has less of water. Yeah, right, true, because
- 10:06Speaker 1: that's a characteristic of the type of fuel, is how
- 10:09Speaker 1: how much moisture it has in it. Yeah, And the
- 10:11Speaker 1: density like twigs obviously will burn faster for two reasons.
- 10:16Speaker 1: One it's because there's it's not as densely packed, because
- 10:20Speaker 1: which will give it more oxygen. Yeah, there's less surface area. Yeah.
- 10:22Speaker 1: And the second is it's smaller and it dries out
- 10:25Speaker 1: more quickly. Yeah, it's not like drying a tree or
- 10:27Speaker 1: a log. Just's got to take a long time to
- 10:29Speaker 1: dry out. Right. And then the same goes for density
- 10:32Speaker 1: with like say tots of pine straw. Right, if it's
- 10:35Speaker 1: very densely packed, Um, it's going to retain moisture in
- 10:38Speaker 1: the middle, which makes it harder to burn. Anytime you've
- 10:41Speaker 1: ever set pine straw on fire, you know, kid, it
- 10:43Speaker 1: smokes a lot if you'd throw a big mess on
- 10:45Speaker 1: your fire, right. But if it's kind of spread out,
- 10:48Speaker 1: it's uh, it drives more easily and it lets more
- 10:52Speaker 1: oxygen in between it, which is another need for fuel. Yeah.
- 10:55Speaker 1: And the small fuel material they call flashy fuels and
- 11:00Speaker 1: were like four fingered, right, and on a chemical level,
- 11:03Speaker 1: they it varies on how long it takes these things
- 11:07Speaker 1: to ignite as well, beyond the fact that it's just
- 11:09Speaker 1: like more dense or bigger or more spread out. Right,
- 11:13Speaker 1: Like when I go camping, I will dry out camp
- 11:17Speaker 1: firewood beside the fire, and you can hear it, says,
- 11:19Speaker 1: you can see it. You can see the moisture sizzling
- 11:22Speaker 1: from the log and then you just inch it closer
- 11:24Speaker 1: and it'll just boom flash point. That's how it happens. Yeah.
- 11:28Speaker 1: Oh another thing, josh, Um, As the fire pushes forward,
- 11:33Speaker 1: it's what it's gonna be doing. Because there's so much
- 11:35Speaker 1: heat associated with it and smoke, it's gonna dry out
- 11:40Speaker 1: the stuff, the fuel in front of it. So by
- 11:42Speaker 1: the time it gets there potentially, I mean, that's why
- 11:45Speaker 1: wildfire happens. By the time it gets there, it's already
- 11:48Speaker 1: dry and right for the picking, and it's just gonna
- 11:51Speaker 1: keep burning and keep burning. There's nothing to stop it. Basically,
- 11:54Speaker 1: that's right. It feeds itself. Um something else that feeds it.
- 11:57Speaker 1: So that was fuel, right. Yeah. The second category or
- 12:01Speaker 1: of factor that really determines how wildfire is going to
- 12:04Speaker 1: go is um weather big time. And you know when
- 12:09Speaker 1: you think of weather, you think, I will you know, rain, snow,
- 12:12Speaker 1: if it's raining, then of course the wildfire is gonna
- 12:14Speaker 1: go out. They point that out in here too, But yeah,
- 12:17Speaker 1: I thought, okay, I thought, um, Kevin went to great, Yeah,
- 12:22Speaker 1: he definitely he dotted his eye on that one. He did,
- 12:25Speaker 1: because yes, obviously, if it's pouring down rain, it's going
- 12:28Speaker 1: to keep everything moist or if it's been raining for
- 12:30Speaker 1: a while, humidity helps big time. But the aspect of weather,
- 12:35Speaker 1: um that probably has more of an effect than any
- 12:39Speaker 1: is wind at So you've got wind outside of the fire,
- 12:43Speaker 1: which is going to push it along, push it in
- 12:45Speaker 1: one direction or another. Well, it's very unpredictable. That's one
- 12:48Speaker 1: of the things the winds, especially the dry Santa Anas
- 12:51Speaker 1: in California. It's already hot and dry wind. So it
- 12:54Speaker 1: might as well be fuel, right, Well, I guess it's
- 12:57Speaker 1: sort of his fuel well traditionally, but it doesn't. It's
- 13:00Speaker 1: not necessarily fuel. But it brings more oxygen to the
- 13:03Speaker 1: fuel too, exactly right, Um, So it pushes fire along.
- 13:07Speaker 1: It's an oxygen delivery system. Wind is um and it doesn't.
- 13:12Speaker 1: There's a guy who's interviewed in this article. His names
- 13:15Speaker 1: Dr Terry Clark at the National Center for Atmospheric research
- 13:19Speaker 1: and he's created this model called coupled fire atmospheric dynamics.
- 13:23Speaker 1: Pretty cool, and basically what he's doing is figuring out
- 13:26Speaker 1: how fire interacts with the surrounding atmosphere and vice versa,
- 13:31Speaker 1: because apparently they feed off of each other. Yeah, fire
- 13:33Speaker 1: can create its own weather system and weather pattern. Yes,
- 13:37Speaker 1: you just seen it before. Like in a really hot fire,
- 13:39Speaker 1: these little tornadoes come up. It's a firewhirl, right, Um,
- 13:42Speaker 1: those can be enormous. It's basically like the heat from
- 13:47Speaker 1: the fire creates a vortex, and the vortex is customarily horizontal,
- 13:52Speaker 1: but if something gets under it, it can stand upright
- 13:56Speaker 1: and it becomes a fire tornado that can throw the
- 13:59Speaker 1: whole logs. I can throw a burning tree like a mile.
- 14:04Speaker 1: It's a it's a it's a monster, and it can
- 14:06Speaker 1: throw it a mile into where there previously was no fire.
- 14:09Speaker 1: And that's why fire forest fires are so hard to fight.
- 14:12Speaker 1: One reason why they are because all of a sudden,
- 14:14Speaker 1: you're fighting it on one front and you've seen them
- 14:17Speaker 1: to leap from the tree tops and all of a sudden, dude,
- 14:19Speaker 1: it's on this side of the mountain now, right. It's
- 14:22Speaker 1: scary stuff, and treetops specifically by the way, that's a
- 14:25Speaker 1: that's a type of fire onto itself. It's that's that's
- 14:27Speaker 1: a crown fire, is what it's called. That's right. Um,
- 14:30Speaker 1: there's a these uh fire whirls, right, the fire tornadoes
- 14:35Speaker 1: they don't necessarily have to follow that. That um, that
- 14:39Speaker 1: process of starting out horizontally and standing up and then
- 14:42Speaker 1: moving like a tornado. There's another thing called a hairpin fireworld.
- 14:47Speaker 1: Is this the forward burst? This is amazing. Basically it's
- 14:51Speaker 1: like the fire develops so much I guess heat, it's
- 14:56Speaker 1: vortexas do it's vortices do that. It shoots forward like
- 14:59Speaker 1: a lamethrower and apparently, uh, these things are they get
- 15:03Speaker 1: up to like sixty six ft wide, right yeah, Um,
- 15:08Speaker 1: they can shoot three hundred plus feet at a hundred
- 15:11Speaker 1: miles an hour. It just all of a sudden, like
- 15:13Speaker 1: the fire just shot a hundred feet forward at a
- 15:17Speaker 1: hundred miles an hour and then in an instant, all
- 15:19Speaker 1: of a sudden, year fire is going in a if
- 15:22Speaker 1: not a different direction and additional direction. Right Because tracking
- 15:25Speaker 1: these things, predicting these things, it's we've figured out or
- 15:29Speaker 1: Dr Terry Clark has figured out, um that it's not
- 15:31Speaker 1: just the atmospheric conditions. It's the fire creating its own stuff,
- 15:35Speaker 1: its own wind, and just moving from both of these
- 15:40Speaker 1: and they call that spotting. If if they if it
- 15:42Speaker 1: tosses embers to another spot, they call that spotting. And
- 15:46Speaker 1: if it if it starts a fire obviously right. Um.
- 15:49Speaker 1: And then temperature also is another factor. If it's warm
- 15:52Speaker 1: out hot, um, you know, obviously that's an extra sixty
- 15:57Speaker 1: hundred degrees that the temper that the sun doesn't have
- 16:00Speaker 1: to heat something up to. Yeah you know, yeah, you never.
- 16:03Speaker 1: That's why they burned mostly or most hot and wild
- 16:06Speaker 1: during the day during the afternoon. Um. California. Like, I
- 16:10Speaker 1: had to get used to camping in California because in Georgia,
- 16:13Speaker 1: George is like a rainforest man. It's like there's never
- 16:15Speaker 1: any fire threat. No. Plus it's so muggy. Yeah, it
- 16:19Speaker 1: is so muggy all the time. There's no way you
- 16:21Speaker 1: couldn't start a fire if you want to. You can't
- 16:23Speaker 1: even strike a match outside right now. But uh, well,
- 16:27Speaker 1: I'm just used to camping with a great, big, awesome
- 16:30Speaker 1: camp fire. But once I headed west into like Colorado
- 16:33Speaker 1: and New Mexico and California, they have you know, every
- 16:36Speaker 1: state park. In national park, you go to a national forest,
- 16:38Speaker 1: says have signs that say you know, fire risk UM high,
- 16:42Speaker 1: no fires at all, or you have to apply for
- 16:45Speaker 1: a fire permit with the the camp camp rangers, camp
- 16:49Speaker 1: rangers forest rangers, and uh, I had to get used
- 16:53Speaker 1: to either sneaking my fire, which is not right and
- 16:56Speaker 1: risking fine, or not having one at all, which why
- 17:00Speaker 1: don't you just go apply for a permit? Well, sometimes
- 17:03Speaker 1: it was the fire risk was so high you're not
- 17:05Speaker 1: supposed to have one at all, And I would still
- 17:07Speaker 1: have one. And I probably shouldn't be saying that, but
- 17:10Speaker 1: I'm super super careful. I didn't when I when I
- 17:12Speaker 1: was living in the van for a little while. UM,
- 17:14Speaker 1: I camped on the northern rim of the Grand Canyon
- 17:18Speaker 1: and I started a fire, but I don't I didn't
- 17:21Speaker 1: see any signs that said no fire or anything, but
- 17:23Speaker 1: I wasn't. I could have totally missed it. Probably no
- 17:25Speaker 1: one said anything, though. Yeah, and you know what, I
- 17:27Speaker 1: was completely irresponsible for doing that. Just let me go
- 17:29Speaker 1: on record and say that it was not the right
- 17:32Speaker 1: thing to do, even though I was super careful, because
- 17:34Speaker 1: accidents happened and I could have easily been that jerk
- 17:38Speaker 1: that like didn't see the ember get away that started
- 17:40Speaker 1: a forest fire. So I want to say, I mean,
- 17:42Speaker 1: if you spark from a train's wheel can start a
- 17:45Speaker 1: forest fire, then yes, very easily a fire that you
- 17:48Speaker 1: started start a forest fire. That was very good, Chuck,
- 17:52Speaker 1: way to see o A. Well, I didn't want to
- 17:53Speaker 1: sound like I was bragging about it, like, oh, I
- 17:55Speaker 1: was super careful. So it was cool. This it was
- 17:57Speaker 1: not cool. There's this guy on um, yeah, I think
- 18:00Speaker 1: take your break. Okay. Do you ever watch Malcolm in
- 18:02Speaker 1: the Middle, Oh yeah, Um, there was this one. There
- 18:04Speaker 1: was this one scene um where the mom was telling
- 18:07Speaker 1: the dad he was he was saying that she was
- 18:10Speaker 1: giving him grief about the stories that he was telling
- 18:13Speaker 1: his kids, and he's like, they're cautionary tales, and she
- 18:16Speaker 1: goes cautionary tales doing him with It was so cool.
- 18:20Speaker 1: I enjoyed that show for a long time. But like
- 18:23Speaker 1: all shows when it's about kids, when they got a
- 18:25Speaker 1: little too old that you know, all of a sudden,
- 18:27Speaker 1: his voice is down. Well, he he cashed out, like
- 18:31Speaker 1: right about that time, he was like I'm out. Malcolm
- 18:33Speaker 1: himself he was like, I've I've got fifteen Porsches and
- 18:36Speaker 1: I'm very happy. I'm done. Well, yeah he went onto
- 18:39Speaker 1: this big movie career. Yeah, that's very sorry. I Cranston
- 18:46Speaker 1: though he's un't seen Breaking Bad, but it's supposed to
- 18:49Speaker 1: be amazing, all right. The last thing, Josh is typography.
- 18:54Speaker 1: That's what we talked about. A steep slope, it's gonna
- 18:56Speaker 1: spread faster, usually spreads uphill, even though leave it to
- 19:00Speaker 1: Australia to do something weird. Dr Terry Clark says he
- 19:05Speaker 1: has a case study in Australia where the fire actually
- 19:08Speaker 1: burned down a sloped mountain, which is pretty unusual. Yes,
- 19:12Speaker 1: normally it burns up for a couple of reasons. The
- 19:16Speaker 1: ambient wind um usually blows uphill. Um the steeper the
- 19:21Speaker 1: slope the better because the fire, the smoke, in the heat,
- 19:25Speaker 1: and the well for the fire. As concerned, it's like,
- 19:29Speaker 1: give me a steep mountain, because the fire would be
- 19:32Speaker 1: standing almost upright then and the smoke and the heat
- 19:35Speaker 1: coming off the fire is um really drying out the
- 19:38Speaker 1: fuel load ahead. So most of the time they burned
- 19:42Speaker 1: upward up the mountain, and then they reached the crest
- 19:44Speaker 1: and they're like, I should have thought this through because
- 19:47Speaker 1: now I have to go down and I can't, which
- 19:49Speaker 1: is good for fighting the fire, not good for the fire.
- 19:53Speaker 1: Um they can besides burning all the vegetation, which is
- 19:58Speaker 1: can be really bad, h uh. It can lead to
- 20:01Speaker 1: things like erosion and mud slides later on because you
- 20:05Speaker 1: mess with the with the ground like that and it's
- 20:07Speaker 1: not stable like it once was. Yeah, I mean, like
- 20:10Speaker 1: the one of the roles that roots a root system
- 20:13Speaker 1: plays is holding the ground in place. And if you've
- 20:15Speaker 1: burned the tree and the roots system out, it's just
- 20:18Speaker 1: soil and the nice heavy rain comes and and that
- 20:22Speaker 1: very thing happened josh in storm King Mountain near Glenwood Springs, Colorado.
- 20:28Speaker 1: Two thousand acre forest burned and the underbrush burned on
- 20:32Speaker 1: the steep slopes, and two months later they got a
- 20:35Speaker 1: lot of heavy rain and it literally poured tons of
- 20:38Speaker 1: mud and rock onto a stretch of Interstate seventy like
- 20:42Speaker 1: engulfing cars, sweeping them into the Colorado River, all because
- 20:46Speaker 1: of the fire months months ago. And we've seen one
- 20:48Speaker 1: slides before. Remember Guatemala. Yeah, remember, like down the mountain
- 20:53Speaker 1: there was still that path. You could see the where
- 20:55Speaker 1: the path standing on this village where they never unearthed
- 20:59Speaker 1: the people and it's like people's kids were running around. Yeah,
- 21:01Speaker 1: it was so sad. Where we were standing was like
- 21:04Speaker 1: six ft higher than it once was, right, yeah, right,
- 21:07Speaker 1: six at least I would say that's awful. So, Chuck,
- 21:10Speaker 1: if you want to put out a fire, well, first
- 21:12Speaker 1: of all, they're beneficial, though we should say that at
- 21:14Speaker 1: times burning the underbrush of a forest can prevent a
- 21:18Speaker 1: larger fire later on, so they do have like prescribed burns,
- 21:23Speaker 1: like you were talking about, Chuck, I inadvertently started a
- 21:26Speaker 1: book club by mentioning again recently, have you noticed a
- 21:30Speaker 1: lot of people have been writing and saying like, thanks man,
- 21:32Speaker 1: I'm starting Yeah, and they're like, what about Yes, it's
- 21:35Speaker 1: another book that's a fake book though, oh is it?
- 21:39Speaker 1: It's yeah, that's the one where the guys like the
- 21:41Speaker 1: Chinese made it to South America or Mexico. So there's
- 21:44Speaker 1: about it. And I pilloried the guy. Okay, yeah, it's
- 21:49Speaker 1: very he has very shaky, shaky evidence. That's fascinating stuff.
- 21:54Speaker 1: But well have we not podcasted on that. Let's do
- 21:57Speaker 1: it all right. I've read that today and I was like,
- 22:00Speaker 1: why haven't we done this yet? We can totally do it.
- 22:02Speaker 1: I think it took a little while for me for
- 22:04Speaker 1: the bitterness to like leave my mouth like after I
- 22:06Speaker 1: wrote that one, because the guy was getting tons of
- 22:08Speaker 1: pressed at the time. But anyway, anyway, anyone who's read
- 22:12Speaker 1: knows that North America it was basically a managed forest,
- 22:16Speaker 1: and one of the ways that it was managed prior
- 22:18Speaker 1: to Columbus was through prescribed burns. Like it there. It
- 22:23Speaker 1: is very beneficially. It burns away the underbrush so you
- 22:27Speaker 1: have less potential for accidental fires. Right, Remember we talked
- 22:30Speaker 1: about recessions are kind of like that um and the
- 22:34Speaker 1: it gets rid of disease, provides nutrients in the soil
- 22:38Speaker 1: um awesome show after you'd like, you know, hit the
- 22:43Speaker 1: peace pipe, just kick back and watch a forest fire go.
- 22:47Speaker 1: So let's talk about putting these things out. Josher's uh.
- 22:52Speaker 1: They have a couple of categories of the these elite firefighters.
- 22:57Speaker 1: They're called hot shots and smoke jumpers. The hot shots.
- 23:01Speaker 1: What's so funny, that's the names they give them. Yeah,
- 23:05Speaker 1: that's pretty let's say that's pretty bad. A alright, hot
- 23:09Speaker 1: shots they work in twenty person teams and they are
- 23:13Speaker 1: trained there on the ground and they're trained to build
- 23:17Speaker 1: mainly to build fire breaks, and that is when they
- 23:20Speaker 1: strip the land of fuel ahead of the fire, or
- 23:24Speaker 1: they will burn it ahead of the fire. Yeah, to
- 23:27Speaker 1: stop it there have you ever seen that? Gods must
- 23:29Speaker 1: be crazy too. No, the dude, the main dude, I
- 23:33Speaker 1: can't remember his name. He um. There's a brush fire
- 23:37Speaker 1: coming like a prairie fire, savannah fire coming at the
- 23:40Speaker 1: main characters, and they're about to be engulfed in it.
- 23:43Speaker 1: And the main bushman runs and grabs like a piece
- 23:48Speaker 1: of grass or whatever and sets fire to the grass
- 23:52Speaker 1: behind them that they are running into and burns it
- 23:55Speaker 1: and then basically creates a circle. It's a backfire fire break,
- 23:59Speaker 1: and they're all standing circle where there's no more fuel
- 24:01Speaker 1: any longer. It's completely in otterly genius. Well it is.
- 24:04Speaker 1: And it's also you have to be you have to
- 24:07Speaker 1: really know what you're doing. You know, you have to
- 24:09Speaker 1: put it in the exact right spot. I know that
- 24:10Speaker 1: sometimes they'll do the firebreak and the fire will leap
- 24:14Speaker 1: over that, and then that's kind of make you feel like, yeah,
- 24:18Speaker 1: there's nothing we can do well in a lot of cases.
- 24:22Speaker 1: I mean, it's like I remember, was it two years ago?
- 24:25Speaker 1: Was or maybe it's three years ago when they had
- 24:27Speaker 1: all those wildfires, and uh, I remember thinking, like what
- 24:31Speaker 1: we can do medically, and like, we can, you know,
- 24:34Speaker 1: put a man on the moon, but we can't stop
- 24:37Speaker 1: a fire. And it's that out of control because it's
- 24:39Speaker 1: so huge and overwhelming, very deep chuck. Actually, there's there's
- 24:45Speaker 1: smoke jumpers, which are hotshots that jump out of airplanes, right, yeah,
- 24:49Speaker 1: and there's only a couple of hundred of them in
- 24:51Speaker 1: the US, which I can imagine. That's a really specialized
- 24:55Speaker 1: job and you have to be a tough mug to
- 24:58Speaker 1: do that. That would be having long he did in Firestorm,
- 25:02Speaker 1: I think he was. I didn't see it. Not many
- 25:05Speaker 1: people saw it, actually, but I did copy the the
- 25:09Speaker 1: description from IMDb. I thought it was just about like
- 25:13Speaker 1: a firefighter and like forest fires, but of course, because
- 25:16Speaker 1: it's Hollywood, they added some plot to it. Firefighter Jesse
- 25:20Speaker 1: Graves has to save ornithologist Jennifer and other people in
- 25:24Speaker 1: a forest fire. Like I thought that was it, but no,
- 25:27Speaker 1: it was set up by the lawyer of a convicted killer,
- 25:30Speaker 1: Earl Shay, who escaped from prison with several of his inmates,
- 25:33Speaker 1: posing his firefighters to recover thirty seven million and stashed loot.
- 25:38Speaker 1: So they were acting. They started the fire and purpose
- 25:40Speaker 1: it was sort of like the guys who posed as
- 25:42Speaker 1: uh ambulance drivers to get the dude out of prison.
- 25:46Speaker 1: That sounds awesome, actually, I mean the plot description sounds
- 25:50Speaker 1: pretty awesome. You can tell you hear like Howie Long,
- 25:54Speaker 1: it's going to be awful. But like, I'm sure the
- 25:56Speaker 1: writer of that was like, okay, I'm honestly yeah. Then
- 26:00Speaker 1: he hears it's gonna be Firestorm starring how He Long,
- 26:03Speaker 1: and he's like, I'm sure that the writer, Alan Smithy
- 26:06Speaker 1: was pretty psyched about his project for a little while.
- 26:09Speaker 1: So chuck, oh, uh, you can fight a fire using
- 26:15Speaker 1: an air corps right, Oh yeah, that dropped fire retardant
- 26:20Speaker 1: on the fire. You've seen the news footage the red stuff. Yes,
- 26:24Speaker 1: Or they can drop tons of water and have you
- 26:26Speaker 1: ever heard that urban legend? M oh yeah, but what
- 26:30Speaker 1: is it? So there there is a forest fire somewhere
- 26:33Speaker 1: we'll say California, and they put it out, and like
- 26:36Speaker 1: six months later or whatever, some hikers walking through this
- 26:39Speaker 1: area and looks up and notices that there's a scuba
- 26:42Speaker 1: diver stuck in a tree right with the rebreather on
- 26:46Speaker 1: and the the mask on and the flippers and everything,
- 26:49Speaker 1: and um, he's dead. And the hiker can't figure out
- 26:54Speaker 1: what's going on, and you know, leaves the forest and
- 26:56Speaker 1: tell somebody about it, and they start doing some research
- 26:58Speaker 1: and they figure out that he was scooped up by
- 27:01Speaker 1: one of these planes that goes out to the ocean
- 27:03Speaker 1: and like steps up a bunch of water and comes
- 27:05Speaker 1: and dumps it on the totally not true, right wildfire
- 27:08Speaker 1: now the fire, Yeah, it's a good one. I hate
- 27:12Speaker 1: it when you burst urban legends though, because it bursts
- 27:15Speaker 1: so many bubbles there's right now, so it's so beneficial, Like, yes,
- 27:21Speaker 1: I know it's things right now, but in about forty
- 27:24Speaker 1: five seconds, you're going to feel like a smarter person.
- 27:26Speaker 1: That's true. We mentioned the fire retardant that is not
- 27:30Speaker 1: just red stuff. It is um a chemical retardant containing
- 27:34Speaker 1: phosphate fertilizer, and it cools down the fire slows it down.
- 27:38Speaker 1: It's like, uh, it's main ingredient is water though, so
- 27:41Speaker 1: it's like super superwater as far as you know. It's
- 27:44Speaker 1: thinking about when when I was reading about smoke jumpers, um,
- 27:48Speaker 1: the the human cannonball thing that Darka came up with.
- 27:52Speaker 1: It would be perfect for that. You can just be
- 27:53Speaker 1: like to shoot a bunch of smoke jumpers into the
- 27:57Speaker 1: like over the fire into where you want them. You
- 28:00Speaker 1: don't need the parachutes or something. Yeah, I can't imagine
- 28:04Speaker 1: a smoke jumper's job like landing in the middle of
- 28:09Speaker 1: that stuff. Yeah, that's crazy stuff, amazing and um. We
- 28:13Speaker 1: also want to give a shout out to always great
- 28:16Speaker 1: movies starring Richard dreyfuss No always, Oh, I thought you
- 28:23Speaker 1: said we always want to give a shout always remember. Yeah,
- 28:26Speaker 1: that was a good movie. John Goodman, Holly Hunter, Richard
- 28:28Speaker 1: dreyfuss Um and that handsome dude who Yeah, that's right,
- 28:34Speaker 1: the guy that played the handsome guy. And it was
- 28:36Speaker 1: a remake of I think a guy named Joe or
- 28:38Speaker 1: something is h And I also I believe Audrey Hepburn's
- 28:41Speaker 1: final film was It. She was darling in it. She
- 28:45Speaker 1: was she was pretty till the very end is that
- 28:48Speaker 1: it is it? Okay, if you want to know more
- 28:50Speaker 1: about forest fires, you should go into the beloved venerable
- 28:55Speaker 1: website that we work for, how stuff works dot com
- 28:58Speaker 1: and type in wildfires and we have it as one word.
- 29:01Speaker 1: All right, Yes, uh. And if you type an ens
- 29:05Speaker 1: gonna bring up a very cool article. It's some really
- 29:07Speaker 1: great photography too. Um. I think the page one or
- 29:10Speaker 1: page zero pick is just awesome looking. Um. And since
- 29:15Speaker 1: I said handy search bar, that means it's time for
- 29:18Speaker 1: a listener mail. It's not. Oh yeah, that's right. I
- 29:23Speaker 1: don't have a listener mail for this one. Josh, and
- 29:24Speaker 1: I was trying to think of what we could do instead.
- 29:26Speaker 1: Would you come up with? Well? I thought about a
- 29:29Speaker 1: call to action saying that you know, that'd be great
- 29:31Speaker 1: if you could go to iTunes and leave us a
- 29:33Speaker 1: rating and a review. Bad. Some people hate it when
- 29:36Speaker 1: we do that, you know, like we're just begging for
- 29:39Speaker 1: it or whatever. It's beats a pledge drive. Yes, it does, chuck.
- 29:43Speaker 1: You do we ask that much from you guys? Really? No, no,
- 29:49Speaker 1: so so actually we finally worked that up. Call to
- 29:51Speaker 1: action or how about some love for Jerry via email too?
- 29:55Speaker 1: It would be great. Oh that's nice. Some Jerry questions
- 29:58Speaker 1: or both. We'll tell you all about Jerry. Yeah, ask
- 30:00Speaker 1: us really personal questions about our life totally. We've just
- 30:04Speaker 1: been waiting for everyone to ask Yeah. Um, you can
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- 30:11Speaker 1: you want to go give us a rating, a review
- 30:13Speaker 1: on iTunes, that's very nice if you thank you. Um.
- 30:16Speaker 1: But if you want to ask us a question about Jerry,
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- 30:25Speaker 1: s y s K podcast one word um. And then
- 30:29Speaker 1: of course we have our great Facebook page. UM. That's
- 30:32Speaker 1: Facebook dot com slash Stuff you should Know And you
- 30:36Speaker 1: can send us a regular old email and you can
- 30:38Speaker 1: listen to us on WFMU if you're in New York
- 30:41Speaker 1: or New Jersey. Uh nine one point one Friday's between
- 30:45Speaker 1: seven and eight p m. Yes, the Stuff you should
- 30:47Speaker 1: know Radio Public Radio version or ninety point one in
- 30:49Speaker 1: the Hudson Vali Valley. Um. And and is that not
- 30:56Speaker 1: New York, New York's not in the Hudson Valley? Where's
- 30:58Speaker 1: the Hudson, New York State? So that's upstake? Is that
- 31:02Speaker 1: where Albany is? I keep hearing like everybody in law
- 31:05Speaker 1: in order to talk about when the image the governor
- 31:07Speaker 1: huh um. Or you can send us a regular old
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