Hi All. I'm new here and found this forum looking for some help with an issue. We've had some real cold weather the past couple of days and yesterday morning I woke up and have no hot water in my upstairs bathroom. Shower and sink. Both have cold water, but no hot. All of the other water sources are flowing fine. This same thing happened last year on the coldest day of the year for one or two days. I don't think I had any water that time though. This year I just have no hot water. I feel like it anything would freeze it would be the cold lines if any and all of the pipes feel warm under the crawlspace where they go up towards that bathroom. There's no leaking water. No damage last year either. That bathroom has a register in it, but stays real cold. You can feel the draft coming right from where the tub wall is against our outside wall, but I still have a hard time believing it could freeze. Thanks for any help and advice.