Excessive Heat Warning issued June 14 at 8:23AM CDT until June 15 at 8:00PM CDT by NWS

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT WEDNESDAY... * WHAT...Dangerously hot conditions with heat index values up to 108. * WHERE...In Missouri, Jefferson MO, Saint Charles MO, Saint Louis City MO and Saint Louis MO Counties. In Illinois, Madison IL, Monroe IL and Saint Clair Counties.