So it froze last night and I got up this morning to take a shower and there was no hot water coming out. Cold works fine and everywhere else in the house has hot water... What do I do?

Happened to me yesterday, lost hot water all through the house. I have a vent on the outside of the north side of the house that vents the underside of the house. Placed a board tight against it to block it and within 45 minutes the hot water lines thawed and was working again. The north wind is just blowing too hard and too cold!