Arizona Severe Extreme Heat Watch | Effective 06/19/2026 21:27
* WHAT...Dangerously hot conditions possible below 4000 feet, with
daytime temperatures ranging from 97 degrees at Havasupai Gardens,
to 111 degrees at Phantom Ranch.
* WHERE...Lower elevations of the Grand Canyon.
* WHEN...From Monday morning through Tuesday evening.
* IMPACTS...Most individuals will be at risk for heat-related
illnesses without effective cooling or adequate hydration,
especially with prolonged outdoor exposure.
This watch is reserved for only the hottest days of the year and is