Extreme Heat Warning Extended Through Aug. 21 for Large Portions of Arizona
An Extreme Heat Warning covering multiple regions in Arizona now runs longer than initially issued, remaining active until 8:00 p.m. on Aug. 21, 2026.
3 reports on this incident · first at Aug 19, 2026, 6:55 a.m. ET
Hazard products are revised and cancelled as conditions change. Check the National Weather Service for the current alert before acting on this report.
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Earlier reports
Aug 19, 2026, 6:56 a.m. ET
Extreme Heat Warning Covers Phoenix, Scottsdale, Buckeye and Tucson Through Aug. 21
An Extreme Heat Warning has been issued for numerous areas across Arizona, including Buckeye/Avondale, the Northwest Valley and Scottsdale/Paradise Valley, FOX 10 Phoenix reported. The warning is in effect until 8:00 PM on August 21, 2026.
According to FOX 10 Phoenix, the affected locations include Central Phoenix, North Phoenix/Glendale, East Valley, Southeast Valley/Queen Creek, Buckeye/Avondale, Northwest Valley, Scottsdale/Paradise Valley, Fountain Hills/East Mesa, South Mountain/Ahwatukee, Cave Creek/New River, Deer Valley, Aguila Valley, Tonopah Desert, Gila River Valley, Gila Bend, West Pinal County, Northwest Pinal County, Southeast Pinal County including Kearny/Mammoth/Oracle, and South Central Pinal County including Eloy/Picacho Peak State Park.
Additional areas covered under the warning include the Tucson Metro Area including Tucson/Green Valley/Marana/Vail, Western Pima County including Ajo/Organ Pipe Cactus National Monument, Tohono O'odham Nation including Sells, Upper Gila River and Aravaipa Valleys including Clifton/Safford, Yuma County, Southeast Yuma County, Central La Paz, Parker Valley, Kofa, San Carlos, Apache Junction/Gold Canyon, and the Sonoran Desert Natl Monument.
FOX 10 Phoenix reported that cities in the warning area include Sells, Kearny, Mammoth, Oracle, Ajo, Clifton, Safford, Tucson, Green Valley, Marana, Vail, and Eloy.
Aug 19, 2026, 6:55 a.m. ETFirst report
Extreme Heat Warning Covers Phoenix, Tucson, Buckeye/Avondale and Scottsdale/Paradise Valley
An Extreme Heat Warning is in effect across a wide stretch of Arizona, including Central Phoenix, the Tucson Metro Area, Buckeye/Avondale, Northwest Valley and Scottsdale/Paradise Valley, according to reporting on August 19, 2026.
fox10phoenix.com reported that the alert was issued at a warning alert level. The start time of the warning was not specified in the report, and it is set to expire at 8:00 p.m. on August 21, 2026.
Across metro Phoenix, the warning covers Central Phoenix, North Phoenix/Glendale, Buckeye/Avondale, Deer Valley, South Mountain/Ahwatukee, Scottsdale/Paradise Valley, Fountain Hills/East Mesa, East Valley, Northwest Valley and Cave Creek/New River.
Other covered regions include the Tucson Metro Area including Tucson/Green Valley/Marana/Vail, South Central Pinal County including Eloy/Picacho Peak State Park, Southeast Pinal County including Kearny/Mammoth/Oracle, Western Pima County including Ajo/Organ Pipe Cactus National Monument, and Upper Gila River and Aravaipa Valleys including Clifton/Safford.
Additional areas listed in the warning are Gila River Valley, Gila Bend, Tonopah Desert, Yuma County, Central La Paz, Aguila Valley, Southeast Yuma County, West Pinal County, Sonoran Desert Natl Monument, Kofa, Southeast Valley/Queen Creek, San Carlos, Northwest Pinal County, Apache Junction/Gold Canyon, Parker Valley, and the Tohono O'odham Nation including Sells.
Cities explicitly named within these zones include Sells, Kearny, Mammoth, Oracle, Ajo, Clifton, Safford, Tucson, Green Valley, Marana, Vail and Eloy.
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Sources
- Phoenix passes 200 miles of cool pavement | FOX 10 Phoenixfox10phoenix.com
Revision history
- Version 119 Aug 2026, 11:23current
First published.
- Version 119 Aug 2026, 10:55current
First published.
- Version 119 Aug 2026, 10:56current
First published.
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