Extreme Heat Warning in Effect for Saint Louis Area Until August 12
Extreme Heat Warning in Effect for Saint Louis Area Until August 12
US · Published Aug 11, 2026
The National Weather Service (NWS) in Saint Louis, Missouri, has issued an Extreme Heat Warning effective from August 10 at 2:43 PM CDT until August 12 at 8:00 PM CDT.
The warning highlights dangerously high temperatures and humidity levels, with heat index values expected to reach up to 111°F (43.9°C).

Impact & Risks

The extreme heat poses significant risks, including heat exhaustion and heat stroke, particularly for vulnerable populations such as children, the elderly, and outdoor workers. Prolonged exposure to high temperatures can lead to severe health complications. Pets and young children should never be left unattended in vehicles, as temperatures can rise rapidly. The Occupational Safety and Health Administration (OSHA) warns that outdoor workers should take frequent breaks in shaded or air-conditioned areas to mitigate risks.

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