* WHAT...For the first Heat Advisory, heat index values up to 110. For the second Heat Advisory, heat index values up to 110 expected.
* WHERE...Portions of southeast Louisiana and southern Mississippi.
* WHEN...For the first Heat Advisory, until 8 PM CDT this evening. For the second Heat Advisory, from 11 AM to 7 PM CDT Thursday.
* IMPACTS...Hot temperatures and high humidity may cause heat illnesses.