You can rinse your brakes and wheels about 10-20 mins after driving....I mean, what happens when you drive through puddles? Chances are, if the car is hot, the water in your hose will initially be hot, so it shouldn't be a big deal.
As long as you thoroughly rinse your brakes and wheels with water until they are cool, you can use a wheel cleaner. It's just a matter of how long you should wait before actually rinsing, and 10-20 minutes has been fine in my experience.