Provide plenty of water and shade.
Fill a child-size wading pool with fresh water for your dog to cool off in.
Don't let your dog hangout inside it's doghouse, they can trap heat and cause exhaustion.
Be mindful of your dog’s breed. Dogs that are brachycephalic (have a short head and snout), such as Bulldogs, Boxers, Japanese Chin, and Pekingese, have an especially hard time in the heat because they do not pant as efficiently as longer-nosed dogs. Keep your brachycephalic dog inside with air-conditioning.
Apply pet sunscreen.
Don't shave your pet.
Keep your dog out of the sun during the hottest hours of the day 11am - 2pm. The best thing to do is to take walks in the early mornings or evenings, when the sun’s heat is less intense.
Keep your dog's paws cool; avoid exposing your dog to hot asphalt or sand for any prolonged period; it can burn his paws.
Be aware of mosquitoes, and use pet safe repellant if necessary.
Consider a life vest if you are on a boat or paddle board.
Keep your pets away from fireworks; this can scare them and they can run off.
Never leave your dog in a closed vehicle on a hot day. The temperature inside a car can reach 100 degrees in just 20 minutes.