Louisiana, Mississippi Severe Extreme Heat Watch | Effective 08/15/2026 09:18

Headline: 
Extreme Heat Watch issued August 15 at 11:18AM CDT until August 17 at 8:00PM CDT by NWS New Orleans LA
Event: 
Extreme Heat Watch
Urgency: 
Future
Effective: 
August 15, 2026 - 9:18am
Expires: 
August 15, 2026 - 11:30pm
Description: 
* WHAT...For the Extreme Heat Warning in effect today and the Extreme Heat Warning tomorrow, expect dangerously hot conditions with heat index values up to 115. * WHERE...All of southeast Louisiana and southern Mississippi. * WHEN...For the first Extreme Heat Warning, until 8 PM CDT this evening. For the second Extreme Heat Warning, from 11 AM to 8 PM CDT Sunday. For the Extreme Heat Watch, from Monday morning through Monday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. Do not leave young children and pets in unattended vehicles. Car interiors will reach lethal temperatures in a matter of minutes. Take extra precautions when outside. Wear lightweight and loose fitting clothing. Try to limit strenuous activities to early morning or evening. Take action when you see symptoms of heat exhaustion and heat stroke.
Area Description: 
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; Southern Jackson
Forcast Office: 
NWS New Orleans LA
Sender: 
w-nws.webmaster@noaa.gov