* WHAT…Heat index values 100 to 109 expected.
* WHERE…All of southern Illinois, southwest Indiana, western
Kentucky, and southeast Missouri.
* WHEN…From noon CDT /1 PM EDT/ Saturday to 7 PM CDT /8 PM EDT/
Tuesday.
* IMPACTS…Hot temperatures and high humidity may cause heat
illnesses.
* ADDITIONAL DETAILS…The first prolonged stretch of heat and
humidity of the season will amplify health impacts. Health impacts
will build with each successive day in the heat and humidity.