Extreme Heat Warning Arizona | Effective 03/21/2026 12:09

Headline: 
Extreme Heat Warning issued March 21 at 12:09PM MST until March 22 at 8:00PM MST by NWS Flagstaff AZ
Event: 
Extreme Heat Warning
Urgency: 
Expected
Effective: 
March 21, 2026 - 12:09pm
Expires: 
March 22, 2026 - 5:00am
Description: 
* WHAT...Dangerously hot conditions, with temperatures up to 99 below 4000 feet. * WHERE...Yavapai County Valleys and Basins. * WHEN...Until 8 PM MST Sunday. * IMPACTS...Pets, livestock, and those sensitive to heat, such as the homeless, elderly, and children will be at risk for heat-related illnesses. Those without effective cooling and/or adequate hydration will be at the greatest risk.
Instruction: 
Take action when you see symptoms of heat exhaustion and heat stroke. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency! Call 9 1 1. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke. Stay cool, stay hydrated, stay informed.
Area Description: 
Yavapai County Valleys and Basins
Forcast Office: 
NWS Flagstaff AZ