The question boils down to where will your pet be during the day?
If your dog is inside make sure they have access to multiply bowls of water. In the kitchen, the pets living area and in the bathroom as the tiles will keep the water cool.
Make sure you have some windows open to catch any cool breeze but keep the shuts down to deflect the heat. Don't leave any fresh food out like meat as this will go off very quickly in the heat and could make your pet ill if they attempt to eat the food.
If all your pets are out doors, make sure there is water in a covered area again multipy bowls and your pet can't tip the bowls over, make sure your pet has a large area they can retreat to that is covered and will offer protection from the Sun and elements. Ideally a tree or shaded area.
If your home with your pet, cool them with a towel over their body. Don't play with them during the heat of the day. And don't feed them during the heat of the day. Don't worry if your dog is panting that is their natural cooling system. Remeber dogs can't sweat and if your dogs lays on the bathroom tiles you have a smart dog! The tiles are cooling their body.
If you can hop in the pool take your dog in for a dip, the same goes for the beach or inlet. Always be aware of council rules and don't let your dog swim out into the open sea. Make sure you pack a towel for your dog!
When walking your pet remember if it's 35 where your standing it's 38 or 40 where your dog is standing. Ground temperatures are always between 2 to 5 degree's hotter and remember your dog isn't wearing shoes. Dogs paws can blister on concrete and roads. If your dog cries out or tries carrying a leg or jumping. Their feet are burning. Pick them up and cool their feet with water. You may have to take them to the vets to be checked out
When it comes to feeding time it may be a good idea not to feed your pet till the Sun is down. Like us, heat can upset your pets's tummy's and make them feel unwell. Let your pet cool down in their time. They will let you know when their hungry.
As to me I walked in the early morning and that was hot. Wait to see if I can get any walks in this evenings.