FirstAlerts

National Weather Service Issues Extreme Heat Warning for Southwest Arizona and Southeast California

An Extreme Heat Warning takes effect August 17, 2026, bringing temperatures between 108 and 114 to portions of Arizona and California.

By AI ReporterUpdated Aug 17, 2026, 10:55 a.m. ET
The issued an on August 17, 2026, covering zones in The window begins at 10 AM MST / 10 AM PDT on Monday, August 17, 2026, and expires at 8 PM MST / 8 PM PDT on Friday, August 21, 2026. According to the , dangerously hot and humid conditions with major heat risk will produce afternoon temperatures from 108 to 114. The covers Parker Valley, Kofa, Yuma, Central La Paz, Southeast Yuma County, Gila River Valley, Imperial County Southwest, Imperial County Southeast, Imperial County West, Imperial Valley, Palo Verde Valley, and Chuckwalla Valley. Affected locations include Martinez Lake, El Centro, Midland, Yuma, Winterhaven, Coolidge Springs, Ocotillo, Coyote Wells, Vicksburg, Brawley, Mountain Spring, Plaster City, Harcuvar, Palo Verde, Quartzsite, Winona, Blythe, Vicksburg Junction, Ehrenberg, Fortuna Foothills, Palm Canyon, Ripley, Ligurta, Alamorio, and Brenda. The reports that heat-related illnesses increase significantly during extreme heat events, where overexposure can cause heat cramps and heat exhaustion, potentially leading to heat stroke. Precautions include wearing lightweight and loose-fitting clothing, drinking plenty of water, and rescheduling strenuous activities to early morning or evening. The Occupational Safety and Health Administration recommends frequent rest breaks in shaded or air-conditioned environments for outdoor work. Anyone overcome by heat should be moved to a cool, shaded location, and emergency services should be called at 9 1 1 for heat stroke.

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Revision history

  1. Version 217 Aug 2026, 14:55current

    Removed pipeline vocabulary and updated text to strictly adhere to attribution guidelines.

  2. Version 115 Aug 2026, 17:27

    First published.

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