⚠️ Heat Advisory – Llano; Burnet; Williamson; Hays; Travis; Bastrop; Lee; Medina; Bexar; Comal; Guadalupe; Caldwell; Fayette; Frio; Atascosa; Wilson; Karnes; Gonzales; De Witt; Lavaca – Tuesday, July 21, 2026

Event	Heat Advisory
Severity	Moderate
Urgency	Expected
Certainty	Likely
Area	Llano; Burnet; Williamson; Hays; Travis; Bastrop; Lee; Medina; Bexar; Comal; Guadalupe; Caldwell; Fayette; Frio; Atascosa; Wilson; Karnes; Gonzales; De Witt; Lavaca
Effective	7/21/2026, 11:46:00 AM CDT
Expires	7/22/2026, 1:15:00 AM CDT

Heat Advisory issued July 21 at 11:46AM CDT until July 22 at 8:00PM CDT by NWS Austin/San Antonio TX

* WHAT…High temperatures of 100 to 104 degrees and heat index
values up to 112 degrees expected.

* WHERE…Areas generally along and east of the Interstate 35
corridor.

* WHEN…From Noon to 8 PM CDT Wednesday.

* 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.

Do not leave young children or pets in unattended vehicles. Car
interiors will reach lethal temperatures in a matter of minutes.

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