Mustn't forget that OP is in Germany, and this is the first time in that country that they hit those high temperatures. To make things worse, usually homes in Germany do not have central heat and air, so this is quite bad as you cannot really cool down at home, either.
As a German who moved to the US many years ago, having air conditioning literally everywhere here is something I take for granted now - because you can enjoy very comfortable temperatures inside your home, car, workplace, public place here regardless of how hot it gets outside.