Active Weather Alerts
Extreme Heat Watch
Issued: 6:59 AM Jun. 27, 2026 – National Weather Service
...EXTREME HEAT WATCH IN EFFECT FROM SUNDAY AFTERNOON THROUGH THURSDAY EVENING... * WHAT...Dangerously hot conditions with heat index values of 105 to 110 possible. * WHERE...In Illinois, Madison IL, Monroe IL, and Saint Clair IL Counties. In Missouri, Jefferson MO, Saint Charles MO, Saint Louis City MO, and Saint Louis MO Counties. * WHEN...From Sunday afternoon through Thursday evening. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. PRECAUTIONARY/PREPAREDNESS ACTIONS... Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors. &&
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