Extreme Heat Watch
2026-08-21T20:00:00-07:00

* WHAT...Dangerously hot conditions with temperatures up to 115 to 118 degrees expected through Death Valley and the Lower Colorado River Valley, with highs between 107 to 110 degrees elsewhere. * WHERE...Portions of northwest Arizona, southeast California, and southern Nevada. * WHEN...From Tuesday morning through Friday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat events.

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