San Antonio, Texas – A dangerous heat wave grips San Antonio and surrounding areas as temperatures soar to 101°F Saturday and Sunday, with heat index values reaching 107°F. Scattered thunderstorms could interrupt the oppressive heat from Saturday afternoon through Monday night, creating hazards for outdoor plans and commuters.
According to the National Weather Service, a 30 percent chance of showers and thunderstorms will arrive Saturday after 1 p.m., dropping to a 20 percent chance by nightfall. Sunday brings relentless sun and similar heat, while isolated storms could return late Monday. The heat index will be particularly risky for anyone without reliable air conditioning. South winds will provide little relief, and overnight lows will remain muggy near 78°F.
San Antonio, New Braunfels, and the I-35 corridor are at the highest risk for heat exhaustion and quick-forming storms. Residents should avoid strenuous activity outdoors during peak heat and hydrate frequently. Vulnerable groups—seniors, children, and outdoor workers—are urged to seek shade and check on neighbors.
Through Tuesday, heat remains the primary concern, but isolated thunderstorm chances will persist into Monday night before conditions turn sunny again. More updates or advisories are possible if storm coverage increases.
Five Day Forecast for San Antonio, Texas:
- Saturday: Hot, high 101°F, 30% chance of storms after 1 p.m.
- Sunday: Sunny, high near 101°F, heat index up to 107°F
- Monday: Mostly sunny, slight chance of storms after 1 p.m., high 100°F
- Tuesday: Sunny, high near 98°F
- Wednesday: Sunny, high near 98°F
