I experienced temperatures that high in Death Valley California, which is said to be one of the hottest places on earth. You just don't go outside in the daytime.
But, at least it cools down a bit after sunset - enough that being outside is pleasant. We were in Phoenix to catch a plane at 5 a.m. in May, and even at that time, it was too hot outside to be comfortable.
It's hot enough for me here in the Pacific Northwest, though it rarely even goes above 30 degrees C. Hot enough that we have AC window units in the office and the bedroom for summer.


Though we don't need to keep them on all the time - it's a lovely evening, 25 C at the moment.
But when do get hot spells, the AC provides welcome relief. And AC was one of my few requirements for my new (used) car. When it's really hot (for the Northwest) I will actually cool the car down for 15 minutes or so before driving. I'm such a weeny!