Keep dogs indoors, in air conditioning, on very hot days. Do not leave dogs in a car during the summer. Even with the windows down, temperatures inside a car can quickly rise to above 120 degrees. Make sure outdoor dogs have plenty of shade. Keep fresh water available for dogs at all times.
Exercise dogs early in the morning or late in the evening.
If this is not possible, exercise in an air conditioned environment. On very warm days, provide your dog with a sprinkler or wading pool. If you take the dog to a lake, make sure it has plenty of time to drink and get wet. Most dogs can drink lake water without adverse effects. If the dog has a light coat or exposed skin, take precautions against sunburn.