* WHAT. Heat index values around 105. * WHERE. Portions of central and southern Oklahoma. * WHEN. From 1 PM this afternoon to 9 PM CDT this evening and 1 PM to 9 PM CDT Monday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values around 105. * WHERE. Portions of northern and central Oklahoma. * WHEN. From 1 PM this afternoon to 9 PM CDT this evening and 1 PM to 9 PM CDT Monday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values around 105 expected. * WHERE. Portions of central, northern, southern Oklahoma. * WHEN. From 1 PM this afternoon to 9 PM CDT this evening. Also, from 1 PM to 9 PM CDT Monday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values up to 105 expected. * WHERE. Okfuskee County. * WHEN. From 1 PM this afternoon to 9 PM CDT this evening. * IMPACTS. Heat related illnesses are possible especially impacting those not acclimated to the conditions or those performing strenuous activities.

* WHAT. Heat index values up to 106 expected. * WHERE. In Arkansas, Crawford, Franklin, and Sebastian Counties. In Oklahoma, Muskogee, Sequoyah, Craig, Creek, Mayes, Nowata, Okmulgee, Osage, Pawnee, Rogers, Tulsa, Wagoner, Washington OK, Haskell, Latimer, Le Flore, McIntosh, and Pittsburg Counties. * WHEN. From 1 PM this afternoon to 9 PM CDT this evening. * IMPACTS. Heat related illnesses are possible especially impacting those not acclimated to the conditions or those performing strenuous activities.