When the temperature takes a serious dive, pipes can freeze and potentially burst, spewing water into your home. Fortunately, there are simple steps you can take to thaw out frozen pipes. If you discover a pipe has frozen, turn off the main water supply valve, and open all the faucets in the house. Apply heat to the pipe from a hair dryer, heating pad, or heat lamp. When the ice has melted (water should run from a tap the pipe feeds), partially turn on the water main, and inspect for leaks. If there are none, turn the water main on completely. If, however, a pipe has ruptured, turn off the water main, and call the plumber.