St. Louis

Extreme Heat Warning Extended in St. Louis Amid Risk of Thunderstorms and Flash Flooding

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Published on July 24, 2025
Extreme Heat Warning Extended in St. Louis Amid Risk of Thunderstorms and Flash FloodingSource: Unsplash/ Pegah Mostafavi Zadeh

As St. Louis grapples with scorching temperatures, the National Weather Service (NWS) has extended a warning for the area until this evening. The Extreme Heat Warning, which affects regions including Illinois' Saint Clair and Monroe Counties as well as multiple counties in Missouri, cautions residents of "dangerously hot conditions with heat index values up to 107." With a high near 97°F forecasted today, the steamy conditions pose significant risks for heat-related illnesses.

In a statement obtained by the NWS Extreme Heat Warning, the agency advised individuals to "drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors." Ignoring such precautions, even those who work or spend time outside are being told to schedule frequent breaks in shaded or air-conditioned environments. It is recommended that strenuous activities be rescheduled to the cooler early morning or evening hours.

The oppressive heat is not the only weather-related adversary facing the region. Thunderstorms are anticipated to strike across northeast Missouri and west-central Illinois this afternoon and into the night, with a possibility of severe storms capable of generating damaging winds. The National Weather Service has also flagged a risk for flash flooding in these areas, issuing a flood watch from this afternoon through Friday morning.

According to the latest Hazardous Weather Outlook from NWS, beyond today, thunderstorm chances linger through Sunday and crop up again next Tuesday and Wednesday. Amidst the suffocating heat and storm threats, local residents can seek relief at cooling centers or request energy assistance by contacting the United Way of Greater Saint Louis at 800-427-4626, or by dialing 2-1-1 from a landline phone. Alternatively, Cool Down Saint Louis can be reached at 314-241-7668 for those needing aid.