I live in Europe. My house gets too warm maybe 1 week of the year. I bought a big floor standing fan and it fixed that.

30 degrees Centigrade is exceptional here.

Whereas in other parts of Europe it gets much hotter. Probably best not to generalise over a whole continent that covers 36 degrees of latitude (more than the contiguous 48 states of the US, at about 25 degrees), and goes from islands sat in the Gulf Stream to land sat next to an even larger land mass.