News Summary
San Antonio is preparing for an extreme heat wave with temperatures projected to exceed 100 degrees from Tuesday through Friday. The National Weather Service has issued a heat advisory for South and Central Texas, with the potential for record-breaking highs reaching 107 degrees on Wednesday. This weather pattern marks a concerning trend as San Antonio experiences earlier-than-usual 100-degree days and more frequent extreme heat events, likely due to climate change. Residents are advised to stay hydrated and utilize cooling centers to mitigate heat exposure.
San Antonio is gearing up for an unprecedented heat wave, with temperatures expected to soar into the 100s from Tuesday through Friday. This extreme weather pattern could push the mercury beyond the previous record of 104 degrees set in May 2004.
The National Weather Service has issued a heat advisory for South and Central Texas, indicating dangerously high temperatures of 103 degrees, with heat indices potentially reaching 108 degrees due to humidity. The forecast for Wednesday alone predicts a high of 107 degrees, which would break the record high of 97 degrees set just last year in 2022.
These anticipated heat levels represent an extraordinary spike, with temperatures projected to be 15-20 degrees above the seasonal average. It marks the fourth consecutive year that San Antonio has recorded its first 100-degree day earlier than the average date of June 26, showing a concerning trend in rising temperatures.
This week’s heat wave is particularly alarming as it will last for five consecutive days or more, potentially breaking records each day. Since 1950, temperatures of 100 degrees or higher in May have only been logged 27 times, emphasizing how rare such extreme conditions are for this time of year.
In the last two decades, San Antonio has averaged 26 triple-digit days each year, a stark contrast to the pre-2004 average of just nine days annually. This increase can largely be attributed to climate change, which has made extreme heat events more frequent in the region.
For residents, precautions are crucial during this intense heat. Experts recommend staying hydrated, avoiding prolonged outdoor activities during the peak heat hours, and ensuring access to air conditioning. Those without air conditioning are encouraged to utilize the approximately 60 cooling centers available across the city, including public libraries and community centers, to mitigate heat exposure.
Scientists have expressed concern regarding the early onset of this heat wave, as the human body may not yet be acclimated to such elevated temperatures during May. Furthermore, this week may see some of the hottest temperatures recorded globally, particularly affecting major population centers like San Antonio, where conditions are expected to be severe.
The weather patterns currently shifting across the region suggest a summer-like regime is taking hold, driven primarily by a ridge of high pressure. This shift is sparking notable temperature increases and may indicate an overall trend of higher-than-average summer temperatures throughout the state of Texas.
With extended forecasts pointing to above-normal temperatures, residents should remain vigilant and prepared as San Antonio braces for one of the hottest stretches in its recorded history.
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Additional Resources
- San Antonio Express-News
- Wikipedia: Heat wave
- KSAT News
- Google Search: San Antonio heat wave 2025
- San Antonio Express-News
- Google Scholar: Impact of heat waves
- San Antonio Express-News
- Encyclopedia Britannica: Texas climate
- Weather.com
- Google News: Texas heat wave 2025
Author: STAFF HERE SAN ANTONIO WRITER
The SAN ANTONIO STAFF WRITER represents the experienced team at HERESanAntonio.com, your go-to source for actionable local news and information in San Antonio, Bexar County, and beyond. Specializing in "news you can use," we cover essential topics like product reviews for personal and business needs, local business directories, politics, real estate trends, neighborhood insights, and state news affecting the area—with deep expertise drawn from years of dedicated reporting and strong community input, including local press releases and business updates. We deliver top reporting on high-value events such as Fiesta San Antonio, San Antonio Stock Show & Rodeo, and Dia de los Muertos. Our coverage extends to key organizations like the Greater San Antonio Chamber of Commerce and United Way of San Antonio and Bexar County, plus leading businesses in retail, insurance, and energy that power the local economy such as H-E-B, USAA, and Valero Energy. As part of the broader HERE network, including HEREAustinTX.com, HERECollegeStation.com, HEREDallas.com, and HEREHouston.com, we provide comprehensive, credible insights into Texas's dynamic landscape.
