I'm a PNW native and made it through the heat dome. I had an old window unit AC in the bedroom that made it much more tolerable, though the walls in the rest of the house were hot to the touch (I had a terrible roof at the time). The entire time the scenario of everyone maxing out their AC and the power going out, though, plagued me to the point that I spent most of my time out of the bedroom, trying to make sure I would acclimatize a bit in case that happened. I think we can survive more than we think we can, but I really don't want to put that to the test.

I did have some food around that didn't need refrigeration just in case. Next time I'll make sure I have some water squirreled away just in case the water goes out too for some reason.