⚠️ Heat Advisory – Williamson; Hays; Travis; Bastrop; Lee; Bexar; Comal; Guadalupe; Caldwell; Fayette; Atascosa; Wilson; Karnes; Gonzales; De Witt; Lavaca – Friday, September 11, 2026

Event	Heat Advisory
Severity	Moderate
Urgency	Expected
Certainty	Likely
Area	Williamson; Hays; Travis; Bastrop; Lee; Bexar; Comal; Guadalupe; Caldwell; Fayette; Atascosa; Wilson; Karnes; Gonzales; De Witt; Lavaca
Effective	9/11/2026, 12:08:00 PM CDT
Expires	9/11/2026, 8:15:00 PM CDT

Heat Advisory issued September 11 at 12:08PM CDT until September 12 at 7:00PM CDT by NWS Austin/San Antonio TX

* WHAT…Temperatures up to 103 and heat index values up to 108
degrees expected.

* WHERE…The I-35 corridor and Coastal Plains.

* WHEN…From noon to 7 PM CDT Saturday.

* IMPACTS…Hot temperatures and high humidity may cause heat
illnesses.

Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.

This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.