It's crazy over here where I am at right now. The past two weeks we've had daily changes in temperature. One day a 100 degrees, the next day 67, the day after another 100 degrees...
We don't have AC in Germany. It's something you find in malls, movie theaters or office buildings but I personally don't know any German that has AC in their home.
As a matter of a fact most homes are build the way that you just don't need AC.
We are miserable in military housing but most of the older farming homes are build the way that you have a pretty good climate inside the building. I love my granddads home because it is really cool inside while you could cook an egg without a pan on the hood of a car.
As for the dogs. They are somewhat miserable. I only train in short sequences and have a bowl of water handy. We go swimming and I too have a pool. But I never do much because the concentration isn't the same. I rather do it in the early morning or evening when it is cooler. I actually went on walks when it was hot but never longer than half an hour. They are acclimated, they don't know it better and I let them tell me when enough is enough.