If you crank up the heat in the lake house and it's still [really] cold...
If you try to wash your hands and the water is freezing...
If you attempt to cook on the stove and it doesn't work...
YOU'RE PROBABLY OUT OF GAS!
--Note to self...they do not automatically come fill the gas take at the lake house. If you don't want your daughter to get hyperthermia, check your tank!