Cold air just slurps up all the warmth for two-thirds of the country on Christmas Eve. In some places temperatures could drop dozens of degrees in a matter of hours, experts told the Times. Famously far-flung areas such as the Plains, Midwest and Great Lakes state can expect the extra wallop of snow with their frigid temperatures.

If you are driving around the holidays this year, it’s always a good idea to make sure your phone is fully charged and that you have some sort of blankets and water in your car before heading out. Not a cheerful thought, but neither is sliding into a snowbank.