Parts of Texas are under extreme heat warnings and advisories Thursday, June 18, with forecasts calling for feels-like temperatures up to 125 degrees in South Texas and warnings in Central and South regions through the evening.
By Thursday morning, the heat in Texas is already looming like a new aftershock—right on top of days of severe flooding that have left many Gulf Coast communities still dealing with wet, damaged ground.
The National Weather Service says dangerous conditions are expected to intensify across the state on June 18. Feels-like temperatures are forecast to soar as high as 120 degrees in parts of Texas, triggering extreme heat warnings and heat advisories in multiple regions.
Extreme heat warning Central Texas
An extreme heat warning is in effect for parts of Central Texas. including Austin and San Antonio. from noon until 8 p.m. CT on Thursday, June 18. The National Weather Service says heat indices are expected to reach 118 degrees in some areas on Thursday. with the worst of the heat continuing into the weekend.
The message from forecasters is blunt: avoid outdoor activity during the heat of the day. If someone has to be outside, they should drink plenty of water and take frequent breaks in the shade. People are urged to stay indoors in air-conditioned spaces as much as possible. including overnight. and to check on family and neighbors.
Heat index numbers in the region are especially unforgiving. The National Weather Service forecasts feels-like temperatures of 116 degrees in Austin and San Antonio on Thursday.
Extreme heat warning South Texas
In South Texas, another extreme heat warning is scheduled to run from 11 a.m. to 8 p.m. CT on Thursday, June 18. Forecasters say heat indices in the region are expected to reach 125 degrees.
The National Weather Service warned that little to no relief is expected tonight through Friday night. It also urged people to make sure elderly residents and vulnerable populations have access to cool locations and water, along with livestock and pets.
Heat advisory Houston area
Not every part of Texas is under an extreme heat warning, but danger is still spreading.
A heat advisory is in effect for the Houston area, including Galveston, from 11 a.m. CT on Thursday to 10 p.m. CT on Friday. High temperatures are expected to reach 95 degrees, but feels-like temperatures will climb to 114 degrees.
Heat advisory North and Central Texas
A heat advisory is also in effect for all of North and Central Texas on Thursday afternoon. The National Weather Service says heat index values will range between 105 and 112 degrees, creating dangerous conditions if people don’t take precautions.
A heat advisory is issued for dangerous heat that isn’t expected to meet warning criteria. The recommendation is to stay in a cool place, especially during the heat of the day and evening.
Forecasters had also been watching weather moving across the Gulf—days of heavy rain stretching across the Gulf Coast. and an expectation that a tropical storm could form off Texas’ coast. But for Thursday. the immediate threat is heat—coming at a time when many Texans are still facing the lingering impacts of former Tropical Storm Arthur.
What the National Weather Service is asking people to do is straightforward: plan for the hottest hours, rely on cooling spaces, and check on anyone who may not be able to protect themselves.
Texas extreme heat warning National Weather Service Austin San Antonio South Texas Houston Galveston heat advisory June 18
125 feels-like sounds fake, but also everybody’s gonna still go to work.
My grandma in San Antonio better not be outside 11-8, like wow. Also with the flooding still happening?? Texas can’t catch a break.
So is this the same ‘heat aftershock’ thing from the flooding? I saw somewhere that wet ground actually makes it cooler, so idk why it’s still saying 125. Either way, just stay inside I guess, but people always ignore it.
No outdoor activity from noon to 8?? That’s literally the whole day. And they’re saying check on family and neighbors which is nice but also like how when half of Austin still doesn’t have power half the time (idk if that’s even true). Drink water, shade, whatever… just sounds miserable.