* WHAT...Dangerously hot conditions with heat index values up to 105 expected. Daily high temperatures in the 90s.
* WHERE...Portions of northern Indiana, southwest Michigan, and northwest Ohio.
* WHEN...From 2 PM EDT /1 PM CDT/ this afternoon to 8 PM EDT /7 PM CDT/ Thursday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
* ADDITIONAL DETAILS...Overnight lows in the mid-70s will offer limited relief from the heat.