Excessive Heat Warning issued June 15 at 3:14AM CDT until June 16 at 8:00PM CDT by NWS

...EXCESSIVE HEAT WARNING REMAINS IN EFFECT UNTIL 8 PM CDT THURSDAY... * WHAT...Dangerously hot conditions with heat index values up to 105. * 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.