If you own the home, or have permission of the owner, a simple attic fan works wonders. You can build it yourself out of an inexpensive box fan and framing. If you already have a crawl through spot in an open hallway, you might already have the opening needed without having to do anything else. As soon as the temp drops at night, open all of the windows and suck out all of the hot air.
Unfortunately, today is predicted hotter than yesterday. My part of the bay is predicted to hit 106 today and tomorrow. Right now at 10 am it’s already 80. It should cool to 97 Friday and be down to 94 on Saturday, but hopefully be down to 88 by Sunday. Just don’t go outside on the sidewalk without shoes. I did that once and burned the bottoms of my feet. This happens nearly every summer, but usually doesn’t last that long. It’s just aggravated this year, by all of the smoke. I really feel for the firefighters out in all of this.