Extreme Heat Warning Issued for Southeast Louisiana and Southern Mississippi
The National Weather Service has issued an Extreme Heat Warning for August 16, 2026, with heat index values expected to reach up to 115.
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.
An has been issued for all of southeast Louisiana and southern Mississippi as a dangerous heat wave develops across the region. According to official reports from the , the situation remains developing.
For Sunday, August 16, 2026, the window starts at 11:00 AM CDT and expires at 8:00 PM CDT. An initial also remains in effect until 8:00 PM CDT this evening. Dangerously hot conditions are expected, with heat index values reaching up to 115. The encompasses zones across the region, including parishes and counties such as Pointe Coupee, West Feliciana, East Feliciana, St. Helena, Washington, Iberville, West Baton Rouge, East Baton Rouge, Assumption, St. James, St. John The Baptist, Upper St. Bernard, Lower St. Bernard, Northern Tangipahoa, Southeast St. Tammany, Western Orleans, Eastern Orleans, Northern St. Tammany, Southwestern St. Tammany, Central Tangipahoa, Lower Tangipahoa, Northern Livingston, Southern Livingston, Western Ascension, Eastern Ascension, Upper Jefferson, Upper Plaquemines, Central Plaquemines, Lower Plaquemines, Central Jefferson, Coastal Jefferson, Upper Lafourche, Lower Lafourche, Upper Terrebonne, Lower Terrebonne, Upper St. Charles, Central St. Charles, Lower St. Charles, Wilkinson, Amite, Pike, Walthall, Pearl River, Northern Hancock, Northern Harrison, Northern Jackson, Southern Hancock, Southern Harrison, and Southern Jackson.
National Weather Service officials noted that heat-related illnesses increase significantly during extreme heat and high humidity. Recommended precautions include drinking plenty of fluids, staying in air-conditioned rooms, staying out of the sun, and checking on relatives and neighbors. Outdoor activity should be limited to early morning or evening, and loose-fitting, lightweight clothing should be worn. Officials emphasize taking immediate action upon seeing symptoms of heat exhaustion or heat stroke, and that children and pets must never be left in unattended vehicles, where interior temperatures can become lethal in minutes.
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