It doesn't take all that long to dry out the ground anyway. I dont think 100 is possible here in June anyway because it hasn't happened in my lifetime, however the heat of next week should dry out the ground nicely, thereby setting the stage for 100 degrees in July. It's like a cold airmass that comes in before a snowstorm, dropping the temperature of the ground and priming it for a big snowstorm that will start to stick right away.