* WHAT. Heat index values up to 107 expected. * WHERE. Grant, Kay, Garfield, Noble, Kingfisher, Logan and Payne Counties. * WHEN. From 11 AM to 9 PM CDT Sunday. * 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 107 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 to 9 PM CDT Sunday. * IMPACTS. Heat related illnesses are possible especially impacting those not acclimated to the conditions or those performing strenuous activities.