* WHAT...For the Heat Advisory, heat index values up to 113 expected. For the Extreme Heat Warning, dangerously hot conditions with heat index values up to 117 expected.
* WHERE...Portions of central, south central, southwest, and west central Louisiana and southeast Texas.
* WHEN...For the Heat Advisory, until 7 PM CDT this evening. For the Extreme Heat Warning, from 10 AM to 8 PM CDT Wednesday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Hot temperatures and high humidity may cause heat illnesses.