If you have wildlife in your yard (squirrels, birds, etc), they would most appreciate a shallow pan of water to drink out of, but make sure you change the water daily to avoid mosquitoes.
And if yo u have a pond, keep the water temps below 85 or your fish will get overheated and cook.
That *is* good advice. And keep your pets on the grass and off the hot pavement. If it's too hot for your bare feet, it's too hot for their paws.