* WHAT...Dangerously hot conditions with heat index values up to 112 expected.
* WHERE...The Hill Country, Edwards Plateau, and northern Rio Grande Plains.
* WHEN...From noon to 8 PM CDT Thursday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.
* ADDITIONAL DETAILS...Little in the way of extreme heat has been observed so far this Summer. The risk will be higher with little time to adjust to the extreme heat.