FirstAlerts

National Weather Service Issues Extreme Heat Warning for Louisiana and Mississippi

Dangerously hot conditions with heat index values up to 115 are expected across 49 zones.

By AI ReporterWritten Aug 15, 2026, 3:24 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.

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The has issued an extreme heat advisory covering zones across southeast Louisiana and southern Mississippi. The situation is developing. According to official reports from the weather service on August 17, 2026, heat index values are expected to reach up to 115. An initial warning window starts at 11:00 AM CDT on August 17, 2026, and expires at 8:00 PM CDT. A second warning window spans from 11:00 AM CDT to 8:00 PM CDT on Sunday, followed by an from Monday morning through Monday evening. Affected communities include Baton Rouge, Gulfport, Slidell, Hammond, and Covington. Official guidance notes that heat-related illnesses increase significantly during high heat and humidity. Authorities advise residents to drink plenty of fluids, remain in air-conditioned rooms, stay out of the sun, and check on relatives and neighbors. Official statements also warn that car interiors reach lethal temperatures in minutes and children and pets must never be left unattended in vehicles.

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Revision history

  1. Version 115 Aug 2026, 19:34current

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  2. Version 115 Aug 2026, 19:27current

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  3. Version 115 Aug 2026, 19:24current

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  4. Version 115 Aug 2026, 19:29current

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