If your car heater not blowing hot air, you must know how to keep warm in a car overnight- ● Start your car early, i.e. before you get into it so that engine will warm it up for you. ● Park it in a covered area. It’s better not to let snow accumulate on your car. ● If you can’t park it in a covered area, at least cover the windshield. It will keep some of the colds away. ● Get a hot drink. It will warm up your body from the inside. ● Get a seat warmer if your car doesn’t have one. You can buy them off the market, and they help a lot. ● Keeping some blankets in the car will save you from freezing if your car heater is not working.