Quick Answer
To stay warm inside a car during severe cold, use the car's engine to warm up the cabin, but be cautious of carbon monoxide poisoning, and use insulation and other techniques to retain the heat.
Preparing the Car for Warmth
Before starting the engine, make sure the car is in a well-ventilated area to prevent carbon monoxide buildup. Open a window slightly, about 1-2 inches, to allow for airflow. This is crucial to prevent carbon monoxide poisoning. Additionally, turn the car’s heating system to the recirculate mode to conserve heat and reduce the risk of carbon monoxide entering the cabin.
Using the Engine for Heat
Run the car’s engine at a moderate speed, between 1,000 to 1,500 RPM, to produce enough heat without overheating. This will also help to conserve fuel. If possible, use a block heater or remote start to preheat the engine before getting in the car. This will warm up the cabin faster and reduce the risk of carbon monoxide poisoning.
Maximizing Warmth and Visibility
Use a blanket or emergency blanket to insulate the windows and doors to retain the heat. You can also use cardboard or newspaper to block cold air from entering the car. If you have a sleeping bag or emergency bivvy sack, use it to stay warm and protected from the elements. To improve visibility, use a flashlight or LED light to see outside the car, and avoid using the car’s interior lights as they can drain the battery.
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