Excessive Heat Warning issued July 04 at 2:39PM CDT until July 06 at 11:00PM CDT by NWS

...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 11 PM CDT WEDNESDAY... * 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 Wednesday.