If a pipe has already frozen it is important to thaw the pipe immediately. Be sure to shut off the water to the house before starting to thaw the pipe; this will prevent any potential flooding if the pipe has been broken. Do not use any high intensity heater such as a blow torch, as these can damage the pipes. The best practice is to use a hair dryer, or a space heater, to blow hot air into the area and thaw the ice inside the pipes. Pipes that are warmed too fast may break. Check the affected area for leaks after thawing to make sure the freeze didn’t damage your pipes. If access to the frozen pipe is tricky, you do not have the proper tools or the pipe has broken, contact a plumber.