Extreme Heat Warning
URGENT - WEATHER MESSAGE
National Weather Service Shreveport LA
1229 AM CDT Fri Aug 21 2026
ARZ072-073-LAZ001>006-010>014-017>022-TXZ124>126-136>138-149>153-
165>167-211900-
/O.UPG.KSHV.HT.Y.0010.000000T0000Z-260822T0200Z/
/O.NEW.KSHV.XH.W.0004.260821T1500Z-260822T0200Z/
Columbia-Union-Caddo-Bossier-Webster-Claiborne-Lincoln-Union-De Soto-
Red River-Bienville-Jackson-Ouachita-Sabine-Natchitoches-Winn-Grant-
Caldwell-La Salle-Wood-Upshur-Marion-Smith-Gregg-Harrison-Cherokee-
Rusk-Panola-Nacogdoches-Shelby-Angelina-San Augustine-Sabine-
Including the cities of Bossier City, San Augustine, Bernice,
Gibsland, Quitman, Gilmer, Clarks, Mansfield, Colfax, Montgomery,
Center, Logansport, Martin, Winnfield, Monroe, Natchitoches,
Marshall, Shreveport, Minden, Big Sandy, Carthage, Ringgold,
Springhill, Many, Tyler, Hemphill, Haynesville, El Dorado, Jonesboro,
Nacogdoches, Columbia, Pleasant Hill, Olla, Winnsboro, Lufkin,
Midway, Coushatta, Grayson, Hawkins, Magnolia, Longview, Arcadia,
Stonewall, Jena, Zwolle, Pineland, Mineola, Farmerville,
Jacksonville, Homer, Dry Prong, Jefferson, Ruston, Henderson, and
Rusk
1229 AM CDT Fri Aug 21 2026
...EXTREME HEAT WARNING IN EFFECT FROM 10 AM THIS MORNING TO 9 PM CDT
THIS EVENING...
* WHAT...Dangerously hot conditions with heat index values up to 114
degrees expected.
* WHERE...Portions of south central and southwest Arkansas, north
central and northwest Louisiana, and east and northeast Texas.
* WHEN...From 10 AM this morning to 9 PM CDT this evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events.
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.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service New Orleans LA
1203 AM CDT Fri Aug 21 2026
LAZ034>037-039-046>048-056>058-064-070-071-076>087-089>100-
MSZ068>071-077-083>088-211915-
/O.CON.KLIX.XH.W.0008.260821T1600Z-260822T0100Z/
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-
Including the cities of Delacroix, Walker, Lettsworth, Meraux,
Crossroads, Shell Beach, Jean Lafitte, Boutte, Mandeville,
Braithwaite, Picayune, Diamondhead, Waveland, Greensburg, Hahnville,
French Settlement, Port Allen, Robert, Brusly, Wakefield, Lutcher,
Laplace, Gonzales, Dolorosa, Chalmette, Hammond, Pascagoula, Violet,
Easleyville, Cut Off, Convent, Donaldsonville, Westwego, Vancleave,
Labadieville, Fort Adams, Folsom, Cocodrie, Paincourtville, Bayou
Sorrel, Tickfaw, Norco, Livingston, Prairieville, Escatawpa, Dexter,
Long Beach, Independence, Saucier, Centreville, New Orleans,
Galliano, Alliance, Thibodaux, Grand Isle, Bonnet Carre Spillway,
Amite, Sellers, Felps, Enon, Biloxi, Wilmer, Addis, McComb, Wade,
Kiln, Pearlington, Raceland, Smithdale, Clinton, Leeville, White
Castle, Kentwood, Harahan, Bayou Cane, Montegut, Lafitte, Montz, Moss
Point, Gretna, Reserve, Madisonville, Dulac, Spillman, Gloster,
Poplarville, Livonia, Ponchatoula, Sorrento, Larose, Houma, Gulfport,
Destrehan, Covington, Bush, Liberty, Akers, Plaquemine, Gautier,
Metairie, Port Sulphur, Belle Chasse, Montpelier, Denham Springs,
Yscloskey, Acy, Franklinton, Salem, Slidell, Whitehall, Tylertown,
Necaise, Killian, Lyman, Pass Christian, McNeil, Golden Meadow,
Gramercy, Pierre Part, East New Orleans, Chauvin, Roseland, Geismar,
Luling, Springfield, Kenner,
Pointe A La Hache, New Roads, Gillsburg, Bay St. Louis, St.
Martin, Ocean Springs, Baton Rouge, Marrero, Lockport, Barataria,
Woodville, Buras, Bogalusa, Darlington, Jackson, and St.
Francisville
1203 AM CDT Fri Aug 21 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 11 AM THIS MORNING TO
8 PM CDT THIS EVENING...
* WHAT...Dangerously hot conditions with heat index values up to 115
expected.
* WHERE...All of southeast Louisiana and southern Mississippi.
* WHEN...From 11 AM this morning to 8 PM CDT this evening.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events.
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.
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.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Lake Charles LA
1109 PM CDT Thu Aug 20 2026
LAZ027>029-032-033-TXZ180-259-260-211700-
/O.CON.KLCH.XH.W.0002.260821T1500Z-260822T0100Z/
Vernon-Rapides-Avoyelles-Evangeline-St. Landry-Tyler-Northern
Jasper-Northern Newton-
Including the cities of Hillister, Jasper, Bunkie, Reddell, Fort
Polk, Fred, Pineville, Bleakwood, Cottonport, Newton, Mamou, Beaver,
Burkeville, Jamestown, Lawtell, Effie, Pickering, Eunice, Simmesport,
Spurger, Ivanhoe, Farrsville, Slagle, Woodville, Opelousas, Ville
Platte, Town Bluff, Leesville, Alexandria,
Warren, Roganville, Magnolia Springs, Mansura, Holly Springs, St.
Landry, Mt. Union, Kirbyville, Wiergate, Marksville, and Call
1109 PM CDT Thu Aug 20 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 10 AM TO 8 PM CDT
FRIDAY...
* WHAT...Dangerously hot conditions with heat index values up to 113
expected.
* WHERE...In Louisiana, Avoyelles, Evangeline, Rapides, St. Landry,
and Vernon Parishes. In Texas, Northern Jasper, Northern Newton,
and Tyler Counties.
* WHEN...From 10 AM to 8 PM CDT Friday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events.
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.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Lake Charles LA
1109 PM CDT Thu Aug 20 2026
LAZ030-031-044-045-055-141>143-152>154-241>243-TXZ201-261-262-515-
516-615-616-211700-
/O.UPG.KLCH.HT.Y.0018.260821T1500Z-260822T0100Z/
/O.EXA.KLCH.XH.W.0002.260821T1500Z-260822T0100Z/
Beauregard-Allen-Lafayette-Upper St. Martin-Lower St. Martin-
Northern Calcasieu-Northern Jefferson Davis-Northern Acadia-Upper
Vermilion-Upper Iberia-Upper St. Mary-Southern Calcasieu-Southern
Jefferson Davis-Southern Acadia-Hardin-Southern Jasper-Southern
Newton-Upper Jefferson-Northern Orange-Lower Jefferson-Southern
Orange-
Including the cities of Jeanerette, Carlyss, Evadale, Branch, Lake
Charles, Cade, Iota, China, Oakdale, Hathaway, Crowley, De
Quincy, Morgan City, Westlake, Sulphur, Gist, Gueydan, St.
Martinville, Topsy, De Ridder, Fenton, Bundick Lake, Oretta,
Mauriceville, Port Arthur, Jennings, Berwick, Patterson, Welsh,
Kinder, Lafayette, Silsbee, Sea Rim State Park, New Iberia, Bell
City, Meaux, Vidor, Lake Arthur, Bayou Vista, Beaumont, Fields,
Stephensville, Morse, Deweyville, Orange, Rayne, Elton, Maurice,
Lumberton, Sabine Pass, Iowa, Franklin, Buna, Moss Bluff, Kaplan,
Centerville, Hayes, Church Point, Breaux Bridge, Vinton, Bridge City,
and Nederland
1109 PM CDT Thu Aug 20 2026
...EXTREME HEAT WARNING IN EFFECT FROM 10 AM TO 8 PM CDT FRIDAY...
* WHAT...Dangerously hot conditions with heat index values up to 113
expected.
* WHERE...Portions of south central and southwest Louisiana and
southeast Texas.
* WHEN...From 10 AM to 8 PM CDT Friday.
* IMPACTS...Heat related illnesses increase significantly during
extreme heat and high humidity events.
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.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Jackson MS
852 PM CDT Thu Aug 20 2026
LAZ007>009-015-016-023>026-MSZ040>043-047>049-053>055-059>064-072-
211000-
/O.CON.KJAN.XH.W.0009.260821T1600Z-260822T0100Z/
Morehouse-West Carroll-East Carroll-Richland-Madison LA-Franklin
LA-Catahoula-Tensas-Concordia-Issaquena-Sharkey-Yazoo-Madison MS-
Warren-Hinds-Rankin-Claiborne-Copiah-Simpson-Jefferson-Adams-
Franklin MS-Lincoln-Lawrence-Jefferson Davis-Marion-
Including the cities of Jackson, Tallulah, Ridgeland, Meadville, Oak
Grove, Vidalia, Jonesville, Mendenhall, Canton, Natchez, Ferriday,
Yazoo City, Roxie, Rolling Fork, Lake Providence, Epps, New Hebron,
Hazlehurst, Harrisonburg, Prentiss, Bude, Richland, West Ferriday,
Mayersville, Vicksburg, Brandon, Bassfield, Wesson, Waterproof,
Delhi, Magee, Monticello, Madison, Bastrop, Pearl, Brookhaven,
Columbia, Newellton, Rayville, Winnsboro,
Anguilla, St. Joseph, Fayette, Port Gibson, and Crystal Springs
852 PM CDT Thu Aug 20 2026
...EXTREME HEAT WARNING REMAINS IN EFFECT FROM 11 AM TO 8 PM CDT
FRIDAY...
* WHAT...For the Extreme Heat Warning, dangerously hot conditions
with heat index values in excess of 110 degrees expected and up to
115 degrees possible.
* WHERE...Portions of northeast Louisiana and central, south central,
southwest, and west central Mississippi.
* WHEN...From 11 AM to 8 PM CDT Friday.
* IMPACTS...Hot temperatures and high humidity may cause heat related
illnesses.
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.
Monitor the latest forecasts and warnings for updates.
&&
$$
Heat Advisory
URGENT - WEATHER MESSAGE
National Weather Service Houston/Galveston TX
1152 PM CDT Thu Aug 20 2026
TXZ163-164-176>179-195>200-210>214-226-227-235>238-300-313-335>338-
436>439-211700-
/O.EXT.KHGX.HT.Y.0008.000000T0000Z-260823T0000Z/
Houston-Trinity-Madison-Walker-San Jacinto-Polk-Burleson-Brazos-
Washington-Grimes-Montgomery-Northern Liberty-Colorado-Austin-
Waller-Inland Harris-Chambers-Wharton-Fort Bend-Inland Jackson-
Inland Matagorda-Inland Brazoria-Inland Galveston-Southern
Liberty-Coastal Harris-Coastal Jackson-Coastal Matagorda-Coastal
Brazoria-Coastal Galveston-Matagorda Islands-Brazoria Islands-
Galveston Island-Bolivar Peninsula-
Including the cities of El Campo, Pecan Grove, Galveston, Stowell,
Coldspring, Weimar, Winnie, Huntsville, Mont Belvieu,
Eagle Lake, Wharton, Columbus, Houston, Old River-Winfree, Bryan,
Lake Jackson, Navasota, Cleveland, Palacios, First Colony, Bellville,
Waller, Corrigan, Edna, Friendswood, Pasadena, Trinity, Surfside
Beach, Bay City, Ganado, Sugar Land, Devers, Mission Bend, Caldwell,
Crockett, Shepherd, Brenham, Anahuac, Freeport, Groveton,
Madisonville, Prairie View, Alvin, Dickinson, Hempstead, Baytown, La
Marque, Somerville, League City, Texas City, Dayton, College Station,
Sealy, Pearland, Rosenberg, Brookshire, Clute, The Woodlands, Conroe,
Liberty, Missouri City, Livingston, and Angleton
1152 PM CDT Thu Aug 20 2026
...HEAT ADVISORY NOW IN EFFECT UNTIL 7 PM CDT SATURDAY...
* WHAT...Heat index values 108 to 112.
* WHERE...Portions of south central and southeast Texas.
* WHEN...Until 7 PM CDT Saturday.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
* ADDITIONAL DETAILS...Locally higher heat index values are possible,
especially in Chambers, Liberty, San Jacinto and Polk Counties. If
forecast heat indices trend higher, then an Excessive Heat Warning
may be warranted for these counties.
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.
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.
To reduce risk during outdoor work, the Occupational Safety and
Health Administration recommends scheduling frequent rest breaks in
shaded or air conditioned environments. Anyone overcome by heat
should be moved to a cool and shaded location. Heat stroke is an
emergency! Call 9 1 1.
&&
$$
URGENT - WEATHER MESSAGE
National Weather Service Lake Charles LA
1109 PM CDT Thu Aug 20 2026
LAZ073-074-252>254-211700-
/O.CON.KLCH.HT.Y.0018.260821T1500Z-260822T0100Z/
West Cameron-East Cameron-Lower Vermilion-Lower Iberia-Lower St.
Mary-
Including the cities of Forked Island, Avery Island, Grand Lake,
Rutherford Beach, Intracoastal City, Burns Point, Klondike, Cameron,
Hackberry, Grand Chenier, Abbeville, Cypremort Point, Creole, and
Johnson Bayou
1109 PM CDT Thu Aug 20 2026
...HEAT ADVISORY REMAINS IN EFFECT FROM 10 AM TO 8 PM CDT FRIDAY...
* WHAT...Heat index values up to 111 expected.
* WHERE...Lower Iberia, Lower St. Mary, East Cameron, Lower
Vermilion, and West Cameron Parishes.
* WHEN...From 10 AM to 8 PM CDT Friday.
* IMPACTS...Hot temperatures and high humidity may cause heat
illnesses.
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.
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.
Monitor the latest forecasts and warnings for updates.
&&
$$
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