Yes we did. I cancelled practice on a Thursday, the first week of full pads when we had the 90ish temps. I felt like it would be better and safer for the kids (many parent agreed).
It would benefit starting later. But the high temps are supposed to break next week. Thursdays high is 78 as of Friday. Non the less, my kids were pumped up during the game and drained after it. See you all at the game.