Excessive Heat Warning issued July 05 at 2:52AM CDT until July 07 at 11:00PM CDT by NWS

...EXCESSIVE HEAT WARNING NOW IN EFFECT UNTIL 11 PM CDT THURSDAY... * WHAT...Dangerously hot conditions with heat index values up to 111. * 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. * WHEN...Until 11 PM CDT Thursday.