I'm sure there must have been exceptions, but I can't recall any. You see, in my mind there has always been a heat wave around this time of year. As our temperatures hover around 31°C/90°F, I'm feeling like a chicken on a rotisserie and remembering all of those early back-to-school days when I was teaching. The heat wave seemed to happen every single darn year, just when one wants to be as fresh as a daisy to make good initial impressions on those darlings who sat before me eager to soak up my pearls of wisdom. Instead, they had to make do with beholding my sweaty armpits.
The luck of the draw always had me in a hot classroom with poor ventilation and oodles of heat retention. I had four main rooms that were mine over the course of thirty years, and they were all hot ones. Parts of my schools were even reconstructed from time to time, which meant that AC was added — but not for this AC. Nope: I was never fortunate enough to occupy one of those AC'ed rooms — even long after I had paid my dues and had earned it.
Never ever would it occur to me to complain to you dear folk. I'm just reminiscing.