Heat Advisory
Status
Event Continued Active alertStart Time
Tue 07/21/2026 12:00 PM EDTEnd Time
Tue 07/21/2026 09:00 PM EDTSignificance
AdvisoryImpacts
Low impact
Locations Affected
Houston, TX ∙ Pasadena, TX ∙ College Station, TX ∙ League City, TX ∙ Sugar Land, TX ∙ Pearland, TX ∙ Baytown, TX ∙ Bryan, TX ∙ Missouri City, TX ∙ Conroe, TXFull Alert Message
URGENT - WEATHER MESSAGE National Weather Service Houston/Galveston TX 101 AM CDT Tue Jul 21 2026 ...HEAT ADVISORY REMAINS IN EFFECT FROM 11 AM THIS MORNING TO 8 PM CDT THIS EVENING... * WHAT...Heat index values up to 108 expected. * WHERE...Portions of south central and southeast Texas. * WHEN...From 11 AM this morning to 8 PM CDT this evening. * IMPACTS...Hot temperatures and high humidity will increase the risk for heat-related illnesses to occur, particularly for those working or participating in outdoor activities. 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.
Technical Header
TXZ163-164-176>179-195>200-210>214-226-227-235>238-300-313-335>338- 436>439-220100- /O.CON.KHGX.HT.Y.0004.260721T1600Z-260722T0100Z/ 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 Devers, Lake Jackson, Bay City, Houston, Prairie View, Sealy, Waller, Mont Belvieu, Friendswood, Weimar, Pasadena, Baytown, The Woodlands, Groveton, Sugar Land, Eagle Lake, Trinity, Texas City, Corrigan, Huntsville, Missouri City, Columbus, Angleton, Old River-Winfree, Pearland, Ganado, Cleveland, Galveston, Wharton, Somerville, Coldspring, Caldwell, Crockett, Dayton, Alvin, First Colony, Edna, Bellville, La Marque, Surfside Beach, Clute, El Campo, Stowell, Dickinson, Hempstead, Pecan Grove, Livingston, Madisonville, Brenham, Palacios, Winnie, Bryan, Anahuac, Rosenberg, Shepherd, Liberty, Navasota, League City, College Station, Freeport, Conroe, Brookshire, and Mission Bend 101 AM CDT Tue Jul 21 2026
