Sleeping In A Car Can Be Fatal: Here's What To Do To Keep You Safe

Sleeping in a car carries serious risks that can lead to fatalities, mainly from carbon monoxide poisoning, heatstroke, or hypothermia. Limited ventilation in enclosed vehicles traps hazardous gases or extreme temperatures, turning a temporary rest into a deadly situation. Authorities worldwide report multiple cases annually where drivers or passengers have died after dozing off in parked cars.

Carbon Monoxide Threat

Carbon monoxide buildup poses the primary threat. Exhaust fumes from a running engine can seep inside through gaps or faulty seals, even with windows cracked. The colourless, odourless gas binds to haemoglobin in the blood, preventing oxygen transport and causing unconsciousness or death within minutes.

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In the US, the National Highway Traffic Safety Administration links drowsy driving to thousands of crashes yearly, with some involving vehicles left idling while occupants slept. Indian roads see similar dangers, as fatigue contributes to 19 percent of rear-end collisions according to transport studies.

Heatstroke/Hypothermia Risks

Extreme weather amplifies the hazards. In summer, car interiors can reach 50 degrees Celsius or higher within 30 minutes, even with windows up, leading to heatstroke. Similarly, winter nights drop cabin temperatures below freezing, risking hypothermia. Sleep disorders like obstructive sleep apnoea worsen the issue.

Roadside Hazards

Fatigue prompts unsafe stops on highways. Dimly lit shoulders expose sleepers to high-speed impacts. Drowsy drivers face impaired judgment, choosing spots near traffic flow.

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Key Safety Tips

• To stay safe, never sleep with the engine running, it is imperative to turn it off completely.
• Park in well-lit, populated areas away from traffic, such as rest stops or parking lots with CCTV.
• Crack windows slightly for airflow, but avoid this in polluted or rainy conditions.
• Use a blanket for warmth without blocking vents.
• Set phone alarms for short naps of 20-30 minutes maximum.
• Seek alternatives when tired.
• Pull over at designated safe zones, call a ride-share service or friend, or check into a motel.
• Hydrate and eat light snacks to combat fatigue.