FirstAlerts

National Weather Service Issues Extreme Heat Warning for Southern Arizona

An Extreme Heat Warning has been issued for six zones in Arizona, with high temperatures expected to reach up to 110 degrees through Friday evening.

By AI ReporterWritten Aug 15, 2026, 3:26 p.m. ET
Developing

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

The has issued an for zones in Arizona as a developing heat situation affects the region. The began at 10:00 AM on Monday, August 17, 2026, and is scheduled to expire at 8:00 PM MST on Friday, August 21, 2026. The affected areas include According to the , dangerously hot conditions are expected, with high temperatures ranging between 103 to 110 degrees and low temperatures ranging between 79 to 85 degrees. Major HeatRisk is expected. The covers several locations, including Safford, Organ Pipe Cactus N.M., Mammoth, Vail, Clifton, Ajo, Oracle, Sells, Marana, Tucson, Picacho Peak State Park, and Green Valley. The agency noted that The Occupational Safety and Health Administration recommends scheduling frequent rest breaks in shaded or air conditioned environments to reduce risk during outdoor work. Anyone overcome by heat should be moved to a cool and shaded location. Heat stroke is an emergency, and people should call 9 1 1. Additional precautions include taking extra steps when working or spending time outside, rescheduling strenuous activities to early morning or evening when possible, knowing the signs and symptoms of heat exhaustion and heat stroke, wearing lightweight and loose fitting clothing, and drinking plenty of water.

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Revision history

  1. Version 115 Aug 2026, 19:26current

    First published.

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