Shut off the water immediately. Don't attempt to thaw frozen pipes unless the water is shut off. Freezing can often cause unseen cracks in pipes or joints.
Apply heat to the frozen pipe by warming the air around it, or by applying heat directly to a pipe. You can use a hair dryer, space heater or hot water. Be sure not to leave space heaters unattended, and avoid the use of kerosene heaters or open flames.
Once the pipes have thawed, turn the water back on slowly and check for cracks and leaks.Thaw the pipe safely. If you know where the pipes are frozen, you can attempt to thaw them with a hair dryer. Using a low heat setting, wave the warm air back and forth along the pipe. It’s a slow but safe process.Do NOT use an open flame to thaw frozen pipes. You could start a fire. Also, overheating a single spot can cause the pipe to burst.Be prepared to turn off the main control valve (below right illustration). The pipe you are thawing may already be broken, cracked or split. Water could come gushing out as the pipe thaws.
When you are out not at home ,here are some tips for you .
Have a friend, relative or neighbor regularly check your property to ensure that the heat is working and the pipes have not frozen.
A freeze alarm can be purchased for less than $100 and will call a user-selected phone number if the inside temperature drops below 45 degrees.
Residents are also reminded to clear snow from hydrants. Substantial snow accumulations combined with the after-effects of plowing roads and parking lots can leave fire hydrants partially or completely buried in snow.