* WHAT...Dangerously hot conditions with heat index values in excess of 110 expected.
* WHERE...Portions of northwest and west central Arkansas and east central, northeast, and southeast Oklahoma.
* WHEN...For the first Extreme Heat Warning, until 8 PM CDT this evening. For the second Extreme Heat Warning, from noon to 7 PM CDT Wednesday.
* IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events.