Apply electrically powered heat tape; this will ensure protection against frozen pipes in the coldest weather as long as the utilities are on. Apply the tape in a spiral pattern following the manufacturer's recommendations regarding the distance between individual coils.Warm the area with a heat lamp if all the pipes are concentrated in one small space.
Use foam rubber or fiberglass insulation (see Tips below) to cover all exposed lengths and joints of the pipe if electrical solutions are inappropriate. (If you've used heat tape you may need to go up one size in fiberglass insulation covering to get a proper fit.)
Secure the sections of insulation with tape as needed.
Prevent drafts of frigid winter air. Secure all crawl space openings or windows and insulate and caulk any cracks in the structure's foundation.
NEVER apply an open flame to your pipes. This can only destroy them. If you don’t know anything about fixing pipes and water lines, then don’t hesitate to contact a plumbing company which can help you out.
Your pipes can get frozen not only because of cold air, but they can also become frozen due to the cold water inside it. Thus, you are recommended to purchase a RedyTemp which can tell you the temperature of the internal water of your pipes.