San Antonio Braces for Extreme Heat With Forecasted “Feels-Like” Temperatures Reaching 107 Degrees

San Antonio, TX, September 17, 2026 —

San Antonio residents are being advised to prepare for exceptionally high heat conditions as forecasters predict “feels-like” temperatures could reach as high as 107 degrees Fahrenheit. This extreme heat index, often referred to as apparent temperature, combines actual air temperature with humidity levels to indicate how hot it will feel to the human body.

The forecast indicates a significant heat event, prompting officials to urge caution for the public. While the specific dates for this forecast were not provided, the potential for such high “feels-like” temperatures underscores the need for awareness and preparedness. High heat and humidity can pose serious health risks, particularly to vulnerable populations such as the elderly, young children, and individuals with pre-existing health conditions.

Experts recommend several measures to mitigate the risks associated with extreme heat. These typically include staying hydrated by drinking plenty of fluids, seeking air-conditioned environments, avoiding strenuous outdoor activities during the hottest parts of the day, and wearing lightweight, light-colored clothing. Public health advisories often emphasize checking on neighbors and relatives who may be more susceptible to heat-related illnesses.

The precise duration of this heatwave and the specific daily peak temperatures within the 107-degree forecast range were not detailed in the initial information. Local authorities typically issue specific guidance and may open cooling centers when heat advisories are in effect. Residents are encouraged to monitor official weather reports for the most current and localized information regarding the heat event.

The potential for temperatures to feel as high as 107 degrees Fahrenheit highlights the significant impact of humidity on perceived heat. Even if the actual air temperature is lower, high humidity can prevent sweat from evaporating efficiently, making it harder for the body to cool down. This can lead to heat exhaustion or, in severe cases, heatstroke. The exact meteorological conditions contributing to this forecast were not specified.

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