{{{{HUGS}}}} We went through this not too long ago. We had a pipe freeze burst under the FR and into the garage. What an ever loving mess it was. I would not turn on the hot water at all until a plumber has come out. In fact, we were told to turn the water off.
This time I would make sure that even if the ceiling needs to be cut away and re-sheet rocked that all the pipes were looked at.
I would wash everything when possible.