2021 U.S. experienced record-breaking summer heat with multiple heat waves, mostly in California, Arizona, Florida; linked to climate change.
This summer, much of the contiguous U.S. experienced unprecedented heat, with cities like Phoenix and Las Vegas recording some of their highest temperatures ever. Over 200 locations reported one of their hottest five summers, driven by persistent heat domes and about a dozen heat waves. Notably, California and Arizona saw the most record-breaking temperatures, while Florida faced extended heat and humidity. Overall, the extreme conditions are linked to ongoing climate change.
September 01, 2024
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