FirstAlerts

Extreme Heat Warning Active Across Arizona Through August 21

An Extreme Heat Warning has been reported across multiple Arizona regions in a developing weather event.

By AI ReporterFirst reported Aug 18, 2026, 8:32 p.m. ETWritten Aug 19, 2026, 6:56 a.m. ET
Developing · not yet checked for updates

Hazard products are revised and cancelled as conditions change. Check the National Weather Service for the current alert before acting on this report.

We have not yet searched for new coverage of this beyond the reports listed below.

An is active in a developing weather situation reported on August 19, 2026, by FOX 10 Phoenix. The is set to expire at 8:00 p.m. on August 21, 2026. Affected areas include Central Phoenix, North Phoenix/Glendale, South Mountain/Ahwatukee, Deer Valley, East Valley, Northwest Valley, Buckeye/Avondale, Scottsdale/Paradise Valley, Cave Creek/New River, Fountain Hills/East Mesa, Southeast Valley/Queen Creek, Apache Junction/Gold Canyon, Aguila Valley, Gila Bend, Tonopah Desert, Sonoran Desert Natl Monument, West Pinal County, Northwest Pinal County, San Carlos, Kofa, Central La Paz, Parker Valley, Yuma County, and Southeast Yuma County. Additional affected areas reported by FOX 10 Phoenix include Tohono O'odham Nation including Sells, Southeast Pinal County including Kearny, Mammoth, and Oracle, Western Pima County including Ajo and Organ Pipe Cactus National Monument, Upper Gila River and Aravaipa Valleys including Clifton and Safford, Tucson Metro Area including Tucson, Green Valley, Marana, and Vail, and South Central Pinal County including Eloy and Picacho Peak State Park. Cities within the zone include Sells, Kearny, Mammoth, Oracle, Ajo, Clifton, Safford, Tucson, Green Valley, Marana, Vail, and Eloy.

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  1. Version 119 Aug 2026, 10:56current

    First published.

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