Jumper cables do the same. It works on any metal pipe.Leave vehicles unlocked if possible. If locks are frozen, put alcohol on the key and try to get it unlocked. May take multiple times. Heating the key a little may help. Careful if the key has a chip. Cover the lock with a piece of tape prior to the freezing rain/snow. Put a tarp over the vehicle you need most - prior to the weather.
Doors frozen shut - Prevent by applying a thin film of lubricant on the rubber weatherseal. WD40, silicon or vaseline.
Add antigel additive to the diesel before cold weather. Put a heavy tarp/blanket over the vehicle and add a source of heat under the vehicle - smudge pot, hair dryer, propane heater, etc. Takes a while to get it heated up.
Don't park steel or rubber track equipment on wet dirt. Can freeze to the ground at cold enough temps. Park on rock, concrete or wood.
Don't set the parking brake. Brakes can freeze to drum or disks. Blow down the water on air brakes before freezing weather.
Copper pipe can be thawed with an old Lincoln style ac arc welder at a low setting. Clamp the two cables to the two sides of the frozen point and turn the welder on. I have never done this, but have read that it works. Best to only do this on a section with no soldered joints.
Gasoline works. Old timers would put a splash in when problems started. Some put a gallon into a tank of #2 before problems started. No, I don't know how big their tank was.