Well, I've been in Greece the last two weeks. It was hot there, too - but delightful sitting outside at a cafe, listening to music and drinking ouzo. I got up at 6 most mornings and took a walk. I do the same thing here in the Sacramento area when it's hot - stay inside during the heat of the day, and enjoy the mornings and early evenings outdoors.
Don't listen to all those people who tell you not to drink alcohol or use ice and all that. If you like it, drink it. I understand that recent studies have shown that alcoholic drinks and soda pop can hydrate you just as well as water can. And when you're in Greece, try Mythos beer. It's good stuff.
-Joe Offer-