* WHAT. Heat index values 105 to 110. * WHERE. Portions of northern, central, and southern Oklahoma. * WHEN.. For Monday through 9 PM CDT this evening. For Tuesdays Heat Advisory, from noon to 9 PM CDT Tuesday. * IMPACTS. Hot temperatures and high humidity may cause heat illnesses.

* WHAT. For the first Heat Advisory, heat index values up to 107. For the second Heat Advisory, heat index values up to 107 expected. * WHERE. Cherokee, Okfuskee, Adair, Creek, Delaware, Osage, Pawnee, Choctaw, Latimer, Pittsburg, and Pushmataha Counties. * WHEN. For the first Heat Advisory, until 9 PM CDT this evening. For the second Heat Advisory, from noon to 9 PM CDT Tuesday. * IMPACTS. Heat related illnesses are possible especially impacting those not acclimated to the conditions or those performing strenuous activities.