* WHAT...Heat index values around or in excess of 100 degrees daily; localized values up to near 110 degrees possible Monday and Tuesday.
* WHERE...All of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri.
* WHEN...Until 8 PM CDT /9 PM EDT/ Wednesday.
* IMPACTS...Hot temperatures and high humidity may cause heat illnesses.
* ADDITIONAL DETAILS...Peak heat index values will be closer to 100 degrees today. Dangerous heat and humidity may also extend into Thursday depending upon the timing of a cold front.