* WHAT...Heat index values of 100 to 107.
* WHERE...Portions of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri.
* WHEN...Until 8 PM CDT /9 PM EDT/ this evening.
* IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
* ADDITIONAL DETAILS...Today will mark the 7th consecutive day with heat index readings exceeding 100 degrees.