'Mother' opened doors to the cooler rooms, but both cats found different places to sleep through the heat - one outside under the trees and one in a room which wasn't the hottest but wasn't the coolest, either. So 'Mother' clearly didn't know better than them.
Having said that, one seemed to enjoy having his fur wiped the wrong way with a cold damp cloth, and purred loudly.
Static caravan purchase is it worth buying