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Valley Hit by Rare Category 5 Dust Storm | Tucson News
A Category 5 dust storm—rare and record-breaking—hit the Valley, blanketing skies with toxic particles smaller than human hairs and forcing air quality warnings through Tuesday evening. Created by ASU scientists, this new scale measures airborne dust intensity, revealing only five such events in 15 years. Breathing outside for an hour could mean inhaling over a million microscopic particles—especially dangerous for those with lung or heart conditions, the elderly, kids, or anyone with a compromised immune system. ASU’s new neighborhood-specific dashboard lets you track real-time storm impact…
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