* WHAT...For the first Heat Advisory, heat index values up to 109. For the second Heat Advisory, heat index values up to 109 expected.
* WHERE...Portions of central, east central, northern, northwest, southeast, southern, and southwest Oklahoma and northern Texas.
* WHEN...For the first Heat Advisory, until 7 PM CDT this evening. For the second Heat Advisory, from noon to 7 PM CDT Wednesday.
* IMPACTS...Hot temperatures and high humidity may cause heat illnesses.