[Sweepi]

Its incredible how much better Italian houses/cities feel at 30C(86F) compared to e.g. German houses/cities at 30C.

While the adaption of solar + air-conditioners (better: reversible heat-pumps) will be a good thing, I hope the local/conventional methods to deal with heat are not forgotten.

[DanielHB]

It is because of insulation and lack of sun-mitigating apparatus (like awnings). Buildings with lots of insulation absorb heat all through the day and release it slowly at night.