* WHAT...FOR THE HEAT ADVISORY, HEAT INDEX VALUES IN EXCESS OF 105FDEGREES EXPECTED. FOR THE EXTREME HEAT WARNING, DANGEROUSLY HOT CONDITIONS WITH HEAT INDEX VALUES IN EXCESS OF 110F DEGREES EXPECTED.

* WHERE...PORTIONS OF SOUTHEAST ARKANSAS AND CENTRAL, NORTH CENTRAL, AND NORTHWEST MISSISSIPPI.

* WHEN...FOR THE HEAT ADVISORY, UNTIL 9 PM CDT THIS EVENING. FOR THE EXTREME HEAT WARNING, FROM 10 AM TO 9 PM CDT MONDAY.

* IMPACTS...HEAT RELATED ILLNESSES INCREASE SIGNIFICANTLY DURING EXTREME HEAT AND HIGH HUMIDITY EVENTS. HOT TEMPERATURES AND HIGH HUMIDITY MAY CAUSE HEAT ILLNESSES.