San Antonio, Texas – San Antonio faces another wave of dangerous heat as temperatures surge to 100°F with heat index values climbing to 104°F by Thursday and Friday. High humidity paired with little overnight cooling means residents should brace for elevated health risks, especially for those working or spending extended time outdoors.
According to the National Weather Service, the intense summer pattern continues with heat advisories likely through at least Saturday. Winds will stay light, offering minimal relief. South and southeast breezes are forecast, but humidity will keep overnight lows stuck near 78°F, making it tough for homes without strong cooling to recover. On Friday and Saturday, highs near 99–100°F persist, and the city will feel even warmer due to oppressive humidity.
Areas across Bexar County, especially urban neighborhoods and those lacking shade, will be most vulnerable. Outdoor activities should be limited between noon and 7 p.m., and local agencies urge checking on elderly neighbors and pets. Hydration is critical—carry water and avoid strenuous chores until after sunset. Power grid demand may spike, so residents are asked to conserve electricity during peak afternoon hours.
The heat is expected to ease slightly by Sunday but will remain above average. More advisories could be issued if temperatures climb higher than expected. Stay tuned for additional updates and warnings as conditions develop.
Five Day Forecast for San Antonio, Texas
- Thursday: Sunny, hot, high near 100°F (heat index 104°F).
- Friday: Sunny, high near 100°F, heat index to 103°F.
- Saturday: Sunny, high near 99°F, still humid.
- Sunday: Sunny, slightly cooler, high near 98°F.
- Monday: Mostly clear, high near 98°F.
