People from the "hotter" regions, how do you deal with the heat?

I am from Eastern Europe and this is the hottest summer on my memory. For at least 3 consecutive years the heat is breaking all records.

This stuff is unbearable, I can't even play video games on my laptop, because it warms up very fast and the keyboard becomes uncomfortable for me to use.

So, could you please share any useful tips on how do you survive the summer?