Extreme Heat Warning in Effect Across Arizona
An Extreme Heat Warning is currently in effect across multiple regions in Arizona, including the Tohono O'odham Nation, Southeast Pinal County, Western Pima County, Tucson Metro Area, and other areas. The warning is set to last until Friday, August 21, 2026, at 8:00 PM MST. Temperatures in some areas, such as Mesa, have reached highs of 109°F (42.8°C). The Grand Canyon Country is also under an Extreme Heat Warning until Thursday, August 20, 2026, at 8:00 PM MST. Residents are urged to take precautions as the heat poses significant health risks, especially for vulnerable populations. Source time: not specified.