Austin Heat Advisory Through Sunday With 105-Degree Forecast

Austin is starting Friday, August 21, near 80 degrees under mostly clear skies, but the easy morning is about to give way to another punishing round of summer heat. Temperatures are expected to climb to 105 degrees this afternoon, with light winds and humidity pushing the heat index even higher. The forecast offers very little relief after sunset or into next week.

Heat Peaks Friday And Saturday

The National Weather Service has a Heat Advisory in effect for the I-35 Corridor, including Austin, through 7 p.m. Sunday, August 23. Friday's heat index could reach 111 degrees, while the advisory warns of heat-index values as high as 112 in parts of the region, according to the National Weather Service.

Friday night will stay mostly clear with a low near 80, but the evening heat index may still reach 109. Saturday is expected to be just as hot, topping out near 105 degrees with a heat index around 110 and only a slight chance of showers or thunderstorms after 4 p.m.

A Brief Storm Chance, Then More Heat

Any Saturday storms should be isolated and brief, with the rain chance rising to about 20% before easing after 10 p.m. Most of the day will remain sunny, and a south-southwest breeze of 0 to 5 mph will do little to soften the afternoon heat.

Sunday brings another sunny 105-degree day with almost no rain expected, followed by a 105-degree Monday. Tuesday may dip slightly to 103 degrees, but Wednesday is forecast to climb back to 105 before Thursday reaches about 103.

Plan Around The Hottest Hours

Residents should limit strenuous outdoor work during the afternoon, drink water regularly, wear lightweight clothing and take frequent breaks in shade or air conditioning. The City of Austin says public libraries and parks can serve as cooling centers during normal operating hours, though people should check hours before heading out.

Children, older adults, people working outdoors and anyone without reliable air conditioning face the greatest risk during this stretch. Check on neighbors and relatives, and treat symptoms such as confusion, fainting or unusually hot skin as an emergency requiring a call to 911.