Wednesday night in for diane, and we do begin with that record heat. The map says it all tonight, more than half the country with temperatures above 90. Many places nearing 100. Records shattered. Paramedics on alert because the first round of heat is often the toughest on your body. As we mentioned, some schools are letting children out early. Then there was this in the heartland, that monstrous tornado touching down and it is relentless, hitting in nearly the same place. Were on the ground there, too. We begin with the heat and how long is this going to last. Heres abcs linzie janis. Reporter three days until the official start of summer, and the east coast is already breaking records. The mercury in philadelphia hitting 94 degrees. Its ridiculous, pouring sweat. Reporter philly so used to snow days, instead sending kids home because of the heat. At the womens u. S. Open in pinehurst, north carolina, fans struggling to stay cool. At high noon, washington d. C. Was the hottest city in