Check out these charts from the New York Times.
There are lots of US cities with triple-digit heat index forecasts, but the hottest ones are all in Arizona.
(The second table is the same, but with heat index forecasts in Celsius).
I’d think it’s impossible to cool down a house with no airconditioning if the outside temperature does not even drop into the 80s at night time.
[Graphic by New York Times]
Here in Seattle I can still get away for now, without deploying my one-room airconditioner (I roll it out of the closet on its wheels and set it up in the bedroom for summer 😃).
For now I open the upstairs windows at 9 pm and let the cool air in.
[Graphic by New York Times]