How to stand against high temperatures

I've been reading about the heatwave in Europe and I'd like to point out some things we do in warmer countries to keep everything livable without relying on a/c. I posted about this once on cohost [RIP] and it got a bit popular, so I think it can help some people out there if I post it again. For context, I'm from a Brazilian city where it's 30ºC almost year-round, day and night (except in winter, when it drops below 10ºC for a few weeks), but I've lived in Europe for 8 years and dealt with the heatwaves there, including some that got to the 40ºC range. So, here are the tips: Cover your windows during the day. From the outside, preferably. Don't let the sun hit the glass and then hit inside, or it will turn your home into an oven. Windows in the shade, facing away from the sun, can even be left open to create an air flow if the wind outside is not warm. Open your windows at night, when the temperature drops. This also brings fresh air inside. If it's too hot, put a cold compress (or a…