I'm not one to understand why people choose to adopt dogs and/or cats, only to make these fur angels live outside. They're part of your family, and wonderful companions, so why aren't they living indoors with you? At any rate, many people choose outdoor living for their pets. When temperatures soar, as they are now in the Memphis area, those animals should be brought inside where there is air conditioning, and have plenty of water available to them. If you're hot, they are too. Try putting on a winter coat, hat, gloves and boots, then step outside in 90-plus degree weather. You wouldn't last long.
Be accountable and responsible pet owners. Bring them inside; it's the humane thing to do.