San Antonio residents will battle triple-digit heat Tuesday as dangerous humidity drives heat index values past 102 degrees. Afternoon storms could disrupt travel along I-35, raising concerns just days before Labor Day weekend begins.
According to the National Weather Service, Tuesday will start mostly sunny, with highs near 97 and light southeast winds. Storms are most likely between 1 p.m. and 7 p.m., with a 30 percent chance of heavy downpours and lightning. Drivers on I-35 and Loop 410 should plan for slick roads during the evening commute.
Monday night brings calmer weather, with lows near 76 and light winds. By Wednesday, highs reach 95 under partly cloudy skies, though scattered afternoon storms remain possible. The unsettled pattern continues into Thursday and Friday, with highs in the upper 90s and isolated storm chances.
The combination of heat and humidity poses risks for outdoor workers, children, and the elderly. Residents are urged to stay hydrated, limit time outside during peak heat, and avoid leaving children or pets in vehicles.
Looking ahead, Labor Day weekend could bring more scattered storms. While no widespread severe weather is expected at this time, isolated heavy showers could impact travel plans. Updates from the National Weather Service will be critical as the holiday approaches.
Five-Day Forecast for San Antonio, TX
- Tuesday: High 97, storms possible after 1 p.m. Heat index 102.
- Wednesday: High 95, partly cloudy, 30% chance of afternoon storms.
- Thursday: Sunny, high 97.
- Friday: High 97, 20% chance of showers late.
- Saturday: High 95, 30% chance of storms.
