Extreme Heat Warning Issued for Central and South Texas
The National Weather Service (NWS) Austin/San Antonio TX has issued an Extreme Heat Warning for parts of Central and South Texas, effective from noon to 8 PM CDT on Thursday, June 18. Dangerously hot conditions are expected, with heat index values potentially reaching 112 degrees Fahrenheit.
An Extreme Heat Warning has been issued by NWS Austin/San Antonio TX, effective from noon to 8 PM CDT on Thursday, June 18, 2026. The warning, originally issued on June 17 at 12:04 AM CDT, is set to expire on June 18 at 8:00 PM CDT. It covers counties including Williamson, Hays, Travis, Bastrop, Lee, Uvalde, Medina, Bexar, Comal, Guadalupe, Caldwell, Fayette, Maverick, Zavala, Frio, Atascosa, Wilson, Karnes, Gonzales, De Witt, Lavaca, and Dimmit. This area encompasses the Hill Country, Edwards Plateau, and northern Rio Grande Plains.
Forecasters expect dangerously hot conditions across the warned region, with heat index values potentially reaching up to 112 degrees Fahrenheit. These conditions significantly increase the risk of heat-related illnesses due to extreme heat and high humidity.
Officials noted that little extreme heat has been observed so far this summer. This lack of acclimatization may increase the risk of heat-related issues, as residents have had little time to adjust to such extreme temperatures.