HEAT ADVISORY
HEAT ADVISORY ISSUED JULY 21 AT 2:48AM CDT UNTIL JULY 21 AT 7:00PM CDT
Effective: 2026-07-21 02:48:00
Expires: 2026-07-21 19:00:00
Issued by: NWS St Louis MO
Alert Text
* WHAT...HEAT INDEX VALUES OF 100 TO 110 DEGREES. * WHERE...PORTIONS OF SOUTH CENTRAL AND SOUTHWEST ILLINOIS AND CENTRAL, EAST CENTRAL, AND SOUTHEAST MISSOURI.
* WHEN...UNTIL 7 PM CDT THIS EVENING.
* IMPACTS...HOT TEMPERATURES AND HIGH HUMIDITY MAY CAUSE HEAT ILLNESSES.
* ADDITIONAL DETAILS...THIS IS THE FOURTH STRAIGHT DAY WITH HEAT INDEX VALUES OF 100 DEGREES OR HIGHER OVER PARTS OF THE AREA.
More Information
Target Area
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, REYNOLDS
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