NWS Names 49 Louisiana and Mississippi Zones Under Extreme Heat Alerts, From Pointe Coupee to Southern Jackson
The National Weather Service New Orleans LA record says heat-related illnesses increase significantly during extreme heat and high humidity events, with heat index values up to 115 expected.
By AI ReporterWritten Aug 15, 2026, 3:27 p.m. ET
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Hazard products are revised and cancelled as conditions change. Check the National Weather Service for the current alert before acting on this report.
Heat related illnesses increase significantly during extreme heat and high humidity events, according to the extreme heat alert product issued by the and published in the National Weather Service raw data feed.
The record covers zones across all of southeast Louisiana and southern Mississippi, where dangerously hot conditions are expected with heat index values up to 115.
**The zones named in the record are:** 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.
**Communities listed in the record include:** Clinton, St. Francisville, Folsom, Gautier, Walker, Hahnville, Convent, Gulfport, Port Allen, Diamondhead, Covington, Baton Rouge, Cut Off, Pointe A La Hache, Slidell, Thibodaux, Dexter, Moss Point, Hammond, Greensburg, Norco, Necaise, Meraux, Addis and Bay St. Louis.
An begins at 11:00 AM CDT on August 17, 2026, and is set to expire at 8:00 PM CDT on August 17, 2026. The record's headline reads: . The weather service noted a first Extreme Heat Warning in effect until 8 PM CDT this evening, a second Extreme Heat Warning from 11 AM to 8 PM CDT Sunday, and the running from Monday morning through Monday evening.
The weather service advises drinking plenty of fluids, staying in an air-conditioned room, staying out of the sun, and checking up on relatives and neighbors. It said young children and pets should not be left in unattended vehicles, because car interiors will reach lethal temperatures in a matter of minutes. The record also urges extra precautions outside, lightweight and loose fitting clothing, limiting strenuous activities to early morning or evening, and taking action at the first symptoms of heat exhaustion and heat stroke.
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