The answer to 'water line frozen' is that a frozen water line is a common problem during cold weather. This happens when the water in the pipe freezes, expanding and causing the pipe to burst. Common symptoms include no water flow, frozen pipes, or water leaks.
The best solution depends on how severe the freeze is. For a minor freeze, you may be able to thaw the pipe yourself using a space heater, heating pad, or even pouring hot water over the frozen section. However, if the pipe has already burst, it's best to call a professional plumber to repair the damage and prevent further issues.