* WHAT...Dangerously hot conditions with heat index values in excess of 110 degrees and peaking around 115 degrees.
* WHERE...Portions of west, central, north and south Mississippi, southeast Arkansas, and northeast Louisiana.
* WHEN...For the Extreme Heat Warning, until 8 PM CDT this evening. For the Heat Advisory, from 11 AM to 8 PM CDT Tuesday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.