* WHAT...Dangerously hot conditions with heat index values 110 to 115 today. Heat index values 105 to 110 expected tomorrow. * WHERE...Portions of northwest and west central Arkansas and east central, northeast, and southeast Oklahoma. * WHEN...For the Extreme Heat Warning, until 8 PM CDT this evening. For the Heat Advisory, from noon to 9 PM CDT Wednesday. * IMPACTS...Heat related illnesses increase significantly during extreme heat and high humidity events. Heat related illnesses are possible especially impacting those not acclimated to the conditions or those performing strenuous activities.

* WHAT...Heat index values 105 to 110 expected today and tomorrow. * WHERE...Cherokee, Northern Sequoyah, Adair, and Delaware Counties. * WHEN...For the first Heat Advisory, until 8 PM CDT this evening. For the second Heat Advisory, from noon to 9 PM CDT Wednesday. * IMPACTS...Heat related illnesses are possible especially impacting those not acclimated to the conditions or those performing strenuous activities.

* WHAT...For the first Heat Advisory, heat index values up to 107 expected. For the second Heat Advisory, heat index values up to 109 expected. * WHERE...In Arkansas, Benton, Carroll, Madison, Northern Crawford, Washington AR, and Northern Franklin Counties. In Oklahoma, Cherokee, Northern Sequoyah, Adair, and Delaware Counties. * WHEN...For the first Heat Advisory, until 8 PM CDT this evening. For the second Heat Advisory, from noon to 8 PM CDT Tuesday. * IMPACTS...Heat related illnesses are possible especially impacting those not acclimated to the conditions or those performing strenuous activities.