Excessive Heat Warning issued July 27 at 3:05AM CDT until July 28 at 9:00PM CDT by NWS

...EXCESSIVE HEAT WARNING IN EFFECT UNTIL 9 PM CDT FRIDAY... * WHAT...Dangerously hot conditions with heat index values up to 114. * WHERE...Portions of south central, southwest, and west central Illinois. Portions of east central, northeast, and southeast Missouri. * WHEN...Until 9 PM CDT Friday.