⚠️ Extreme Heat Watch – Clinton; Washington; Randolph; Madison; St. Clair; Monroe; Boone; Moniteau; Cole; Osage; Callaway; Montgomery; Gasconade; Warren; St. Charles; Franklin; St. Louis; St. Louis City; Jefferson – Saturday, August 8, 2026

Extreme Heat Watch issued August 8 at 2:05AM CDT until August 12 at 8:00PM CDT by NWS St Louis MO

Details

* WHAT…Dangerously hot conditions with heat index values up to 108
possible.

* WHERE…Portions of south central and southwest Illinois and
central and east central Missouri.

* WHEN…From Sunday afternoon through Wednesday 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.