* WHAT...Temperatures up to 95 in the mountains and up to 115 along the Rio Grande expected.
* WHERE...Central Brewster and Lower Brewster Counties, and Chisos Basin.
* WHEN...From 1 PM to 9 PM CDT Saturday.
* IMPACTS...Hot temperatures may cause heat illnesses. The elderly, very young, sick, and people with heart conditions are most at risk in extreme heat.