| Event | Extreme Heat Watch |
| Severity | Severe |
| Urgency | Future |
| Certainty | Likely |
| Area | Madison; St. Clair; Monroe; St. Charles; St. Louis; St. Louis City; Jefferson |
| Effective | 6/27/2026, 1:59:00 AM CDT |
| Expires | 6/27/2026, 5:00:00 PM CDT |
Extreme Heat Watch issued June 27 at 1:59AM CDT until July 3 at 12:00AM CDT by NWS St Louis MO
Details
* 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.
Instructions
Drink plenty of fluids, stay in an air-conditioned room, stay out of
the sun, and check up on relatives and neighbors.
This alert was automatically posted by SkyGuard, MWSC’s severe weather alerting system. Source: National Weather Service.
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