* WHAT...For the Heat Advisory, heat index values between 102 and 107 expected. For the Extreme Heat Watch, dangerously hot conditions with heat index values of 105 to 110 possible.
* WHERE...Portions of southern Illinois, southwest Indiana, western Kentucky, and southeast Missouri.
* WHEN...For the Heat Advisory, from noon CDT /1 PM EDT/ to 8 PM CDT /9 PM EDT/ Sunday. For the Extreme Heat Watch, from Monday morning through Thursday evening.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.
* ADDITIONAL DETAILS...A prolonged period of dangerous heat and humidity is expected this coming week. This heatwave may linger into the 4th of July weekend.