FirstAlerts

National Weather Service Issues Extreme Heat Warning for 10 Oklahoma Counties

The developing heat event is expected to produce heat index values up to 110 on August 20, 2026.

By AI ReporterWritten Aug 19, 2026, 1:43 p.m. ET
Developing · checked 3 min ago

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

We last searched for new coverage of this at Aug 19, 2026, 3:42 p.m. ET — checked 3 min ago.

In a developing situation, an has been issued for counties in Oklahoma on August 20, 2026. According to official records from the , the starts at 1 PM CDT on August 20, 2026, and expires at 8 PM CDT on August 20, 2026. Official records state that dangerously hot conditions with heat index values up to 110 are expected across The alert covers the cities of Madill, Sulphur, Wynnewood, Thackerville, Pauls Valley, Kingston, Ardmore, Davis, Coalgate, Atoka, Marietta, Ada, Tishomingo, Durant, and Lindsay. The warned that heat-related illnesses increase significantly during extreme heat and high humidity events. Recommended precautions include drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking up on relatives and neighbors.

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  1. Version 119 Aug 2026, 17:43current

    First published.

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