* WHAT...For the Extreme Heat Warning, dangerously hot conditions with heat index values reaching 109 to 113. For the Heat Advisory, heat index values up to 109 expected.
* WHERE...Portions of north central, northeast, and northwest Alabama and southern middle Tennessee.
* WHEN...For the Extreme Heat Warning, until 7 PM CDT Thursday. For the Heat Advisory, from 7 PM Thursday to 7 PM CDT Friday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.