San Antonio Faces Dangerous Heat and Scattered Storms This Week

San Antonio, TX – Residents of San Antonio are bracing for a week of extreme temperatures and unsettled weather as fall begins. Tuesday’s highs could reach 98°F, with heat index values near 104, while scattered thunderstorms are forecast for Wednesday and beyond.

Tuesday Heat Advisory

According to the National Weather Service, south winds of 5–10 mph will offer minimal relief. Afternoon temperatures are expected to peak around 98°F, making it essential for anyone outdoors to stay hydrated and limit strenuous activity during the hottest hours.

“The combination of high heat and humidity will make it feel even hotter. Residents should take precautions, especially during midday,” meteorologists advised.

Storm Chances on Wednesday

Weather models indicate a 60% chance of showers and thunderstorms after 1 p.m. Wednesday, potentially bringing relief to parts of Bexar County. While high temperatures may drop slightly to 95°F, commutes along major corridors like I‑35 and I‑10 could be disrupted by heavy rainfall. Drivers are urged to exercise caution during downpours.

By Wednesday night, forecasters predict an additional 50% chance of storms, tapering off late in the evening. Residents are advised to monitor alerts and avoid flooded or waterlogged roadways.

Thursday Transition to Cooler Air

Thursday brings continued unsettled conditions, with a 30% chance of showers and highs near 89°F. Winds are expected to shift northward by evening, signaling the arrival of cooler fall air.

Weekend Forecast: Warm but Slightly Cooler

Friday: Sunny and hot, high near 92°F.
Saturday: Warm, high around 93°F with clear skies.
Sunday: Highs near 82°F, with a 20% chance of showers bringing a mild cooldown.

Residents are encouraged to plan outdoor activities carefully, remain hydrated, and follow local weather updates to stay safe during this mix of heat and storms.