If you have not added antifreeze, the water in the radiator may be freezing. Your engine will overheat if this happens. After starting the engine, watch temperature gauge for signs of overheating. Use the defroster or slightly opened windows to keep them from fogging up. When you drive in snow areas, carry chains in case you find yourself in conditions where you can’t drive without them. Make sure you carry the correct number or size of chains that fit your tires. Learn how to put the chains on before you need to use them. If your car has been parked outside during a snow storm, check the exhaust pipes to make sure they are clear before starting up the car. People can die in snow storms from carbon monoxide poisoning because their pipes were blocked with snow.  Also check your surroundings to avoid backing up into a snow bank.