* WHAT...For the first Heat Advisory, heat index values up to 104. For the second Heat Advisory, heat index values up to 106 expected.
* WHERE...Portions of central, east central, northern, northwest, southeast, southern, southwest, and western Oklahoma and northern Texas.
* WHEN...For the first Heat Advisory, until 8 PM CDT this evening. For the second Heat Advisory, from noon to 8 PM CDT Sunday.
* IMPACTS...Hot temperatures and high humidity may cause heat illnesses.