Humans aren't the only animals that can find a hot summer day overwhelming. But unlike you, your pet has a limited ability to deal with the heat. Dogs release heat through their paw pads and by panting, while humans can sweat through all of the skin on their body. Dehydration can be a big problem for pets during the hot weather, too. According to the ASPCA, animals with flat faces—like Pugs and Persian cats—cannot pant as effectively, and are therefore more susceptible to heat stroke. You should also keep an eye on elderly or overweight pets or animals with heart and lung disease. In the summer, make certain that Fido and Fluffy always have access to plenty of fresh, cool water, and avoid letting them run around outside during the hottest parts of the day.