There is a huge variation in how the kids handle things. I really believe that a large part of this is the kids following their parents' lead. If we act like it's the end of the world, guess what? It is going to be really hard on them. Being resentful, angry, vengeful, etc. isn't just bad for us, it hurts our kids. I'm not saying that the kids are not affected, just that we can have a lot to do with how, and how much.
It's cooling down a little here, though it is supposed to be about 32C here today. I guess it's all relative!