* WHAT…Heat index values of 100 to 105.
* WHERE…The Tri Cities, Thumb, and US-23 corridor of Southeast
Michigan.
* WHEN…Until 8 PM EDT Tuesday.
* IMPACTS…Hot temperatures and high humidity may cause heat
illnesses.
* ADDITIONAL DETAILS…Little to no relief is expected at night as
temperatures only fall into the mid and upper 70s and heat index
lingers around 80.