I woke up this morn and went to turn the hot water onin the bathroom,nothing. I have cold water at all 3 sinks and the tub. The hoter water heater is full of hot water ,but nothing at all out of the hot faucets? Any help

I'm getting a rash of complaints about hot water lines freezing up. I would wait for it to warm up and see if the hot water comes back. Regards, Tom