What is the safest way to unfreeze frozen pipes?

The safest way to thaw frozen pipes is to use gentle, low heat applied slowly. Start by opening the faucet connected to the pipe so water can flow as it thaws. Then apply heat using a hair dryer, starting closest to the faucet and working toward the frozen section. You can also use an electric heating pad wrapped around the pipe or warm towels soaked in hot water. Never use an open flame, propane torch, or any high-heat device, as these can damage pipes or start a fire. Avoid using electrical devices near standing water. If you cannot locate the frozen section or the pipe is inside a wall, call a licensed plumber rather than attempting to fix it yourself.