Extreme Heat Warning for Central Missouri and Southwest Illinois
This alert is no longer in effect.
NOAA issued it on August 14, 2026, 9 days ago. Warnings of this kind stay in effect for hours to a few days, so this page is a historical record of what was issued, not a current warning. For conditions where you are right now, check weather.gov (US), weather.gc.ca (Canada), the Met Office (UK), or the Bureau of Meteorology (Australia).
Areazine synthesizes this NWS weather alert directly from NOAA's official public data feed. See our methodology for full source attribution and refresh cadence.
An Extreme Heat Warning remains in effect until 9 PM CDT Saturday for portions of central, east central, and southeast Missouri and south central and southwest Illinois, with heat index values up to 112.
Read this weather record in 30 seconds
- Record type
- Extreme Heat Warning
- Affected area
- Central Missouri and Southwest Illinois
- Issued
- August 14, 2026
- Issuing authority
- NWS St Louis MO
Heat notices are time-bound and location-specific. Confirm the current forecast and local public-health guidance before relying on this archived record.
Record status: historical. It was issued 9 days ago; use the issuing agency's live warning service for current conditions in Central Missouri and Southwest Illinois.
Alert Details
Extreme Heat Warning issued by NWS St Louis MO. Effective from August 14 at 4:03AM CDT until August 15 at 9:00PM CDT.
Affected Areas
Portions of south central and southwest Illinois and central, east central, and southeast Missouri, including Clinton, Washington, Randolph, Madison, St. Clair, Monroe, Boone, Moniteau, Cole, Osage, Callaway, Montgomery, Gasconade, Warren, St. Charles, Franklin, St. Louis, St. Louis City, Jefferson, Crawford, Washington, St. Francois, Ste. Genevieve, Iron, Madison, and Reynolds counties.
What You Should Do
Drink plenty of fluids, stay in an air-conditioned room, stay out of the sun, and check up on relatives and neighbors.
Expected Conditions
Dangerously hot conditions with heat index values up to 112.
Timeline
The warning is in effect until 9 PM CDT Saturday, August 15.
Original source: NOAA Official Notice ↗
Related Weather Alerts
All Weather Alerts →Nationwide notices with similar length or severity timing 8
Two Areazine-derived peer sets for this NWS weather alert: nearest notices by body length and by same severity near the same agency date. Peers come from other categories so they are not the same-feed Related list above.
Similar body length
Nearest notices by article body length (845 characters here).
Similar severity timing
Same severity (high) notices issued closest in time to August 14, 2026.
Frequently Asked Questions
Common questions about this NWS weather alert.