* WHAT...Temperatures up to 100 expected.
* WHERE...Central Brewster County, and Chinati Mountains, Chisos Basin, Davis Mountains, Davis Mountains Foothills, Marfa Plateau, and Presidio Valley.
* WHEN...For the first Heat Advisory, until 10 PM CDT this evening. For the second Heat Advisory, from noon to 10 PM CDT Thursday.
* IMPACTS...Hot temperatures may cause heat illnesses. Extreme heat will significantly increase the potential for heat related illnesses, particularly for those working or participating in outdoor activities.