Louisiana, Mississippi Moderate Heat Advisory | Effective 08/18/2026 18:39

Headline: 
Heat Advisory issued August 18 at 8:39PM CDT until August 19 at 8:00PM CDT by NWS New Orleans LA
Event: 
Heat Advisory
Urgency: 
Expected
Effective: 
August 18, 2026 - 6:39pm
Expires: 
August 19, 2026 - 11:00am
Description: 
* WHAT...Heat index values up to 110 expected. * WHERE...Portions of southeast Louisiana and southern Mississippi. * WHEN...From 11 AM to 8 PM CDT Wednesday. * IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
Instruction: 
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. 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; 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