* WHAT. Heat index values up to 110 expected. * WHERE. Portions of central, east central, northern, southeast, southern, southwest, and western Oklahoma and northern Texas. * WHEN. From noon today to 9 PM CDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values up to 110 expected. * WHERE. Portions of central, east central, northern, northwest, southeast, southwest, and western Oklahoma. * WHEN. Until 9 PM CDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Heat index values up to 109 expected. * WHERE. Portions of central, northern, northwest, southwest, and western Oklahoma. * WHEN. Until 9 PM CDT this evening. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. Dangerously hot conditions with heat index values up to 112 expected. * WHERE. In Arkansas, Crawford, Franklin, and Sebastian Counties. In Oklahoma, Muskogee, Okfuskee, Sequoyah, Mayes, Okmulgee, Rogers, Tulsa, Wagoner, Haskell, Le Flore, McIntosh, and Pittsburg Counties. * WHEN. Until 9 PM CDT this evening. * IMPACTS. The combination of hot temperatures and high humidity will create a dangerous situation in which heat related illnesses are more likely.

* WHAT. Heat index values up to 108 expected. * WHERE. In Arkansas, Benton, Carroll, Madison, and Washington AR Counties. In Oklahoma, Cherokee, Adair, Craig, Creek, Delaware, Nowata, Osage, Ottawa, Pawnee, Washington OK, Choctaw, Latimer, and Pushmataha Counties. * WHEN. Until 9 PM CDT this evening. * IMPACTS. Heat related illnesses are possible especially impacting those not acclimated to the conditions or those performing strenuous activities.