* WHAT...DANGEROUSLY HOT CONDITIONS WITH HEAT INDEX VALUES OF 102 TO108 DEGREES, AND MORNING LOWS FROM 75 TO 80 DEGREES, POSSIBLE FOR SEVERAL CONSECUTIVE DAYS.

* WHERE...IN ILLINOIS, CLINTON IL, WASHINGTON IL, MADISON IL, MONROE IL, RANDOLPH IL, AND SAINT CLAIR IL COUNTIES. IN MISSOURI, SAINT CHARLES MO, SAINT LOUIS CITY MO, AND SAINT LOUIS MO COUNTIES.

* WHEN...FROM MONDAY AFTERNOON THROUGH FRIDAY EVENING.

* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING EXTREME HEAT AND HIGH HUMIDITY EVENTS.

* ADDITIONAL DETAILS...IN ADDITION TO NEAR-RECORD AFTERNOON TEMPERATURES, WARM MORNING LOWS MAY PROVIDE LITTLE RELIEF, ESPECIALLY WEDNESDAY THROUGH FRIDAY.