This "frozen pipe" talk reminds me of a tip that I should pass on to anyone who lives in a cold area where pipes freeze.
To keep the pipes from freezing, turn on your "hot" and "cold" water nozzles just a tiny bit to let water trickle out of them -- especially at night when the heat's lower in the house and the temps are colder outside.
I usually remember to do this but I was lulled into complacency this year by a wicked warm winter, so yesterday morning when I went to take a shower I discovered that my pipes had frozen.
Luckily I left the valves open for a while and finally water came out (loosening the frozen section) but I now have "TRICKLE" written up on my dry-wipe board in the kitchen so I'm reminded to turn the faucets on a tiny bit at night.
Floods stink, and if a frozen pipe bursts it makes quite a mess, so I try to trickle the water and it keeps 'em from freezing.