Can a dog die from taking a hot bath?
It depends, obviously if the bath was very hot then,
unfortunately, the dog would die. Consider this: If you can take a
bath in the temperature that you want the dog to take without
getting hurt, then its good for the dog. (And also it can die from
drowning, of course, but i don't think thats what you mean)
Answer
Certainly the bathwater should not exceed 100 degrees, just as
for a human. Scalding the skin can lead to pain and infection.