* WHAT...Heat index values up to 110 degrees.
* WHERE...Portions of southeast Arkansas, northeast Louisiana, and central, east central, north central, northeast, northwest, south central, southeast, southwest, and west central Mississippi.
* WHEN...Until 8 PM CDT Sunday.
* IMPACTS...High temperatures and high humidity may cause heat related illnesses.
* ADDITIONAL DETAILS...Temperatures at night will not bring much relief as they struggle to fall below 80 in some cases. The threat for dangerous heat will continue into next week.