 The heat is on for your Sunday, up to 100 degrees this afternoon with the heat index over 105 with a southwest breeze. Tonight's low just 79. Up above 100 again Monday and Tuesday afternoon. By Wednesday, a likely chance of showers and storms with a cold front dropping us into the 80s for highs by Thursday. I'm certified meteorologist Mike Grogan for Fox 23 and 1023, KRMG, Tulsa's News and Talk.