Quick Answer
If you become stranded in your car during a snowstorm, prevent hypothermia by staying inside the vehicle with a reliable heat source, and use insulation to retain warmth. Keep your car doors and windows slightly ajar to allow moisture buildup to escape. Stay hydrated with water and avoid strenuous activities.
Staying Warm Inside the Vehicle
When stranded in your car, use the engine to heat the interior, but ensure the exhaust pipe is not clogged by snow. Run the engine for 10-15 minutes every hour to maintain a warm temperature. This can be done by leaving the car in neutral gear and engaging the parking brake, and opening a window slightly to prevent carbon monoxide buildup. If you have a block heater or remote start, use it to preheat the engine before exiting the vehicle.
Insulating Your Car and Staying Dry
To retain warmth, use a blanket, emergency bivvy sack, or even a space blanket to insulate yourself from the cold metal of the car. Remove any wet clothing and dry off as much as possible. If you have a change of clothes, put on dry, layered clothing to stay warm.
Staying Hydrated and Avoiding Exhaustion
Drink water regularly to stay hydrated, and avoid eating too much or heavy foods that can cause digestive issues. If you have a first-aid kit, use any medications you may need. To conserve energy, avoid engaging in strenuous activities, such as trying to dig out your car, and wait for rescue services to arrive.
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