We've just had almost too much of summer now, although I generally like summer. Four days of at least 32C (90F) in a row, one day 37 (98), and yesterday 36.6 (97) again, with increasing night temperatures (around 27C/80F at midnight). As most people don't have proper air conditioning in the houses, some really suffer at night especially in the upper floors, where it stays around 28-30C.
We've got two portable air conditioners with a hose you have to put outside the window - they really lack efficiency, I only use them from the late evening on until I go to bed, they work ok then. A split air conditioning would be better, but as soon as you've invested in it, the next 5 summers will probably be Middle European again