I thought summer was over

 How do you tell when you have been in a heat wave too long?

I will tell you.

You have been in a heat wave too long, when you look at the outside temp and it is 102°F and you say to yourself, Thank God! It's cool today!

I did that just now. I talked to my youngest earlier, and she made the comment: It's cooler today than yesterday so we won't have to worry about a rotating power outage.