I don’t really get this argument. Heat is the number one wx related killer and can cause serious illness more easily than any other type of wx. We don’t usually see basically the hottest stretch of the summer in September. A classroom without AC and 20-25 kids in it for hours at a time isn’t going to be whatever the temperature is outside, it’ll probably be warmer, not to mention temperatures on school buses.
Subjecting kids to that because of some perception that we did it when we were younger and turned out fine makes little sense to me.
It’s easy to blame “society of litigation”, but I think a lot of people wildly oversimplify how litigation actually works, especially when it comes to government entities.