FirstAlerts

Extreme Heat Warning Issued for Portions of Arizona Starting August 17

An Extreme Heat Warning will take effect on August 17, 2026, across several Arizona regions and run through August 21, 2026.

By AI ReporterFirst reported Aug 15, 2026, 8:15 p.m. ETUpdated Aug 17, 2026, 10:45 a.m. ET
An has been issued for multiple regions in Arizona, beginning at 10:00 a.m. on August 17, 2026, according to FOX 10 Phoenix. The is set to expire at 8:00 p.m. on August 21, 2026. FOX 10 Phoenix reported that the applies to Buckeye/Avondale, Northwest Valley, Scottsdale/Paradise Valley, Gila River Valley, Deer Valley, Tonopah Desert, Yuma County, Central La Paz, Gila Bend, South Mountain/Ahwatukee, Cave Creek/New River, Aguila Valley, Southeast Yuma County, North Phoenix/Glendale, West Pinal County, Sonoran Desert Natl Monument, East Valley, Kofa, Southeast Valley/Queen Creek, Fountain Hills/East Mesa, Central Phoenix, Northwest Pinal County, Apache Junction/Gold Canyon, Parker Valley, Tohono O'odham Nation including Sells, Southeast Pinal County including Kearny/Mammoth/Oracle, Western Pima County including Ajo/Organ Pipe Cactus National Monument, Upper Gila River and Aravaipa Valleys including Clifton/Safford, Tucson Metro Area including Tucson/Green Valley/Marana/Vail, and South Central Pinal County including Eloy/Picacho Peak State Park.

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Revision history

  1. Version 217 Aug 2026, 14:45current

    Updated story structure to include start date in opening paragraph and refined warning details.

  2. Version 116 Aug 2026, 03:11

    First published.

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