Extreme Heat Affects Electric Utility Power Grids STILLWATER, OKLA. (KOSU) - The heat is on across Oklahoma, and although residents are used to scorching August temperatures, 106 degrees is never easy to handle. Brad McGavock, a meteorologist with the National Weather Service in Tulsa, says the worst of the heat will continue through today but then cooler weather will round out the weekend. © Copyright 2012, KOSU