Weather Alerts For Bay Saint Louis, MS

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 8 PM CDT WEDNESDAY # DETAILS -------------------- WHAT For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 111. For the Heat Advisory, heat index values up to 111 expected. WHERE Portions of southeast Louisiana and southern Mississippi. WHEN For the Extreme Heat Warning, until 8 PM CDT this evening. For the Heat Advisory, from 11 AM to 8 PM CDT Wednesday. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses. ISSUED AT Tuesday, August 18, 2026 at 4:05 PM CDT ISSUED BY National Weather Service New Orleans LA HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- 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. # AREAS AFFECTED -------------------- Central St. Charles, Northern Livingston, Southern Jackson, Southwestern St. Tammany, Central Jefferson, Central Tangipahoa, Eastern Ascension, Eastern Orleans, Lower St. Charles, Lower Tangipahoa, Northern Hancock, Northern Harrison, Northern Jackson, Northern St. Tammany, Southeast St. Tammany, Southern Hancock, Southern Harrison, Southern Livingston, St. James, St. John The Baptist, Upper Jefferson, Upper St. Bernard, Upper St. Charles, Western Ascension, Western Orleans Including the cities of Gautier, Gramercy, Meraux, Whitehall, Marrero, Madisonville, Sorrento, Chalmette, Prairieville, Diamondhead, Gulfport, Akers, Ocean Springs, Harahan, Kiln, Moss Point, Biloxi, Walker, Convent, Escatawpa, Barataria, Laplace, Waveland, Covington, Lutcher, Independence, Livingston, Long Beach, Tickfaw, Gretna, Pass Christian, Montz, Norco, St. Martin, Donaldsonville, Westwego, Kenner, Slidell, Destrehan, Boutte, Springfield, East New Orleans, Saucier, Bonnet Carre Spillway, Jean Lafitte, Hammond, Robert, French Settlement, Pascagoula, Violet, Mandeville, Wade, Sellers, New Orleans, Pearlington, Folsom, Lyman, Acy, Vancleave, Ponchatoula, Geismar, Necaise, Denham Springs, Bay St. Louis, Metairie, Bush, Hahnville, Gonzales, Luling, Killian, Lafitte, and Reserve

# HEADLINE -------------------- EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM TO 8 PM CDT WEDNESDAY # DETAILS -------------------- WHAT For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 111. For the Heat Advisory, heat index values up to 111 expected. WHERE Portions of southeast Louisiana and southern Mississippi. WHEN For the Extreme Heat Warning, until 8 PM CDT this evening. For the Heat Advisory, from 11 AM to 8 PM CDT Wednesday. IMPACTS Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses. ISSUED AT Tuesday, August 18, 2026 at 4:05 PM CDT ISSUED BY National Weather Service New Orleans LA HEADER URGENT - WEATHER MESSAGE # PRECAUTIONARY/PREPAREDNESS ACTIONS -------------------- 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. # AREAS AFFECTED -------------------- Central St. Charles, Northern Livingston, Southern Jackson, Southwestern St. Tammany, Central Jefferson, Central Tangipahoa, Eastern Ascension, Eastern Orleans, Lower St. Charles, Lower Tangipahoa, Northern Hancock, Northern Harrison, Northern Jackson, Northern St. Tammany, Southeast St. Tammany, Southern Hancock, Southern Harrison, Southern Livingston, St. James, St. John The Baptist, Upper Jefferson, Upper St. Bernard, Upper St. Charles, Western Ascension, Western Orleans Including the cities of Gautier, Gramercy, Meraux, Whitehall, Marrero, Madisonville, Sorrento, Chalmette, Prairieville, Diamondhead, Gulfport, Akers, Ocean Springs, Harahan, Kiln, Moss Point, Biloxi, Walker, Convent, Escatawpa, Barataria, Laplace, Waveland, Covington, Lutcher, Independence, Livingston, Long Beach, Tickfaw, Gretna, Pass Christian, Montz, Norco, St. Martin, Donaldsonville, Westwego, Kenner, Slidell, Destrehan, Boutte, Springfield, East New Orleans, Saucier, Bonnet Carre Spillway, Jean Lafitte, Hammond, Robert, French Settlement, Pascagoula, Violet, Mandeville, Wade, Sellers, New Orleans, Pearlington, Folsom, Lyman, Acy, Vancleave, Ponchatoula, Geismar, Necaise, Denham Springs, Bay St. Louis, Metairie, Bush, Hahnville, Gonzales, Luling, Killian, Lafitte, and Reserve