Heat Advisory

Locations Affected

San Antonio, TX ∙ New Braunfels, TX ∙ San Marcos, TX ∙ Macdona, TX ∙ Bulverde, TX ∙ Marion, TX ∙ Kenedy, TX ∙ Lackland Air Force Base, TX ∙ Live Oak, TX ∙ Poth, TX

Full Alert Message

URGENT - WEATHER MESSAGE National Weather Service Austin/San Antonio TX 130 AM CDT Thu Aug 27 2026 ...HEAT ADVISORY REMAINS IN EFFECT UNTIL 7 PM CDT THIS EVENING... * WHAT...Temperatures up to 104 and heat index values up to 110 expected. * WHERE...Atascosa, Bexar, Comal, De Witt, Guadalupe, Hays, Karnes, and Wilson Counties. * WHEN...Until 7 PM CDT this evening. * 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. 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.

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