Heat Advisory

Locations Affected

Houston, TX ∙ Pasadena, TX ∙ College Station, TX ∙ Sugar Land, TX ∙ League City, TX ∙ Pearland, TX ∙ Baytown, TX ∙ Bryan, TX ∙ Missouri City, TX ∙ Conroe, TX

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Houston/Galveston TX 956 AM CDT Thu Jun 18 2026 ...EXTREME HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THIS EVENING... ...HEAT ADVISORY IN EFFECT FROM 8 PM THIS EVENING TO 10 PM CDT SATURDAY... * WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 114 expected. For the Heat Advisory, heat index values up to 108 expected. * WHERE...Portions of south central and southeast Texas. * WHEN...For the Extreme Heat Warning, until 8 PM CDT this evening. For the Heat Advisory, from 8 PM this evening to 10 PM CDT Saturday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. 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. 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.

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