* WHAT...For the Heat Advisory, heat index values up to 105 to 109. For the Extreme Heat Warning, dangerously hot conditions with heat index values 110 to 115 expected.
* WHERE...Portions of central, eastern, and north central Arkansas.
* WHEN...For the Heat Advisory, until 9 PM CDT this evening. For the Extreme Heat Warning, from 11 AM Sunday 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.