Keep the engine off while you sleep in the car

You are sleeping in the car. Maybe the lease ended, maybe the money ran out, maybe it is a plan with a number at the end of it. This page is written for an adult sleeping alone in a car and assumes nothing about why. If you are a driver stranded in a snowstorm rather than someone living in the car, there is a page here called Dig out the tailpipe before you run the heater that fits tonight better.

If you are sleeping in a car, keep the engine off while you sleep, and tell a housing line that this is where you are living.

Some people who have lived this way say there is nothing to be ashamed of in it, and one person says the opinions of people who judge do not matter. This page leaves that to you. What it covers is the air you sleep in, the weather, keeping clean, where to park, the paperwork, and the phone call that opens a way out.

The air you sleep in

The US Centers for Disease Control and Prevention says people who are sleeping, drunk or under the influence of other substances can die from carbon monoxide poisoning before they have any symptoms, and that a small leak in a car’s exhaust system can build it up inside the car. That is why the counsel is about the engine. Some people warn that a cold night in a car carries two serious risks: carbon monoxide if snow or leaves block the exhaust, and hypothermia.

People who have done it disagree about idling. One person calls it dangerous and costly and says to sleep somewhere cooler. Another says it is acceptable if you change the oil more often. That second view is about the engine, not about what you breathe. For a driver stranded in a storm the US National Weather Service says to run the motor about ten minutes an hour, open a window a little and clear the snow from the exhaust pipe; that is advice for riding out a storm, not for sleeping a night.

A stove or heater that burns fuel makes carbon monoxide too, and the NHS names cookers and heaters among the sources. One person warns that a camp stove used inside the car is a carbon monoxide risk. The simplest answer is to cook outside and not burn fuel inside the car at all.

More cautions, from one person. One says to look under the car for rust or holes, so that gasoline fumes do not reach you while you sleep, and to keep wet towels out of the car. Some people warn that your own breath fills a closed car with moisture and invites mould.

When it is too cold or too hot

Some people say to prepare for winter early: wool socks, mittens, a hat that covers the ears, wool blankets, a heated mattress pad run from a portable battery, and a jump pack and spare phone power so the car battery does not go flat. One person adds sleep aids: an eye mask, ear plugs, and window nets and fans for ventilation.

Cold can go wrong quietly. The NHS lists the signs of hypothermia as shivering, pale, cold, dry skin, slurred speech, slow breathing, and tiredness or confusion. It says to get the person indoors or somewhere sheltered as quickly as possible, take off wet clothes and wrap them in a blanket or sleeping bag, and not to drive yourself to hospital but to call 999 (911 in the US).

Heat is the other danger. One person says to find shade, use a fan, eat something frozen, and spend the hottest hours in a library or gym. The NHS calls heatstroke a medical emergency: a very high temperature, hot skin without sweating, fast breathing, confusion. Move to a cool place and call 999 (911 in the US). Some people say extreme weather is when car living gets hard or dangerous, even in a mild climate. On a night that is too cold or too hot to sleep without the engine, ask 211 or a housing line for a warm or cool place indoors. They may not have one, but it is the question to ask.

Keeping clean, eating, and not disappearing

Many people who have done this say a gym membership does a great deal of the work: showers, toilets, a warm place to be, somewhere to exercise. Some people say to actually exercise before you shower, because it helps with low mood and makes the visit look like anyone else’s. Some people warn that a gym can ask you to leave, or cancel a membership that is only used for showers. One person adds not to sleep in the gym car park, because it can cost you the membership and in some cities lead to arrest.

Some people say staff may physically move away from you, and that it can feel like being treated as dirty. One person says the people at a gym are busy with their own workouts and do not care why you are there. If the gym is out of reach, some people suggest a library, which gives free internet and a place to sit that costs nothing, or public restrooms at parks and gas stations.

On food, some people warn that living in a car can make depression and poor eating worse. One person says to plan for food that keeps at room temperature, because plain meals get old fast. Some people suggest spending a little on a camp kitchen, a stove, a water jug and a cooler, to cook and shop cheaply. Use the stove outside.

On being alone: some people say isolation and the fear of being seen are a real strain and that keeping up your connections matters. Some people say a library or a monthly cinema pass gives you somewhere to sit in the day that is not the car. One person says local churches, food pantries and college students can offer food, shelter and company without judgement. One person points to online communities for people who live in cars and vans. One person suggests a routine, staying active, managing the shame and loneliness actively and considering therapy. Another says to avoid alcohol and cannabis where they can and to tell yourself that this too shall pass. If the low mood turns dark, 988 in the US and Samaritans in the UK answer at any hour.

Where to park

Some people say to scout places before you need them, and that quiet neighbourhoods can be safer than industrial areas if your car looks clean and unremarkable. Some people say to cover the windows so the car looks dark, to practise climbing from the front seat into the back without opening a door, and to follow the unwritten rules, such as no slammed doors in the evening.

Some people say large retail car parks sometimes tolerate an overnight stay, and that policy differs from store to store. One person says to read the posted signs first, and one mentions an app for checking which stores allow it. Rules about sleeping in a car differ by city and county. Some people say to read the local ordinance, because police or security can fine you. One person warns that police may notice a car that keeps returning to the same area, and that a night in jail could cost a job and the car. This page could not check your area’s rules.

In the US, ask 211 whether your area has a safe-parking program, a lot where you may park overnight with permission. This page could not check where they run, and some places have none.

Money and paperwork while the car is home

Some people warn that the car is both your home and your asset: if it fails or is stolen you can lose both at once, so they put money for repairs, insurance and towing ahead of other savings. One person says to tell your car insurer how you are using the car, because a claim can run into trouble if you do not. This page could not check how your insurer would treat it.

Some people say not having a fixed address causes trouble with background checks and job applications. One person says to set up a mailbox rental before you lose housing, because it needs ID that shows a current address. Another says a mailbox rental is not a full fix, because some systems recognise it as not a home address. Some people say employers rarely ask for proof of residence, only an address where you can get mail, and one person uses a parent’s address for mail. One person says banks can ask for proof of address too.

Getting out of the car

The way out usually starts with a phone call. In the United States, 211 puts you through to a person who looks up local services, free and confidential, and covers help with housing. Say you are sleeping in your car and ask what is available: housing programs, a safe-parking lot, a warm place for a bad night.

In England the government says the local council can give help and advice if you are homeless or about to lose your home. Shelter’s free helpline, 0808 800 4444, is open weekdays from 8am to 5pm, advises if you have nowhere to stay tonight, and does not provide a bed itself; at busy times the wait can be over an hour. Shelter Scotland and Shelter Cymru cover Scotland and Wales.

Whether a room beats the car depends on local rents. One person says to get housemates before you sleep in a car; some people say that in some areas hotels and short-term rentals cost more than keeping the car. One person adds that landlords may want an income that is a multiple of the rent and good credit, so savings alone may not get you through the door.

Who this page is not for

If you are in the car because home is not safe, this is not the page for that: a domestic abuse service is, and if you are in danger now, call 911 or 999. If you are saving hard on purpose in a vehicle fitted for it, with heat and ventilation you trust, much of this is a checklist rather than a warning, and whether the saving is worth the toll is yours to weigh; this page does not argue either way. If a child or a pet sleeps in the car with you, keeping the engine off applies to them too, and on the call to 211 or your council say that a child is with you; this page does not cover the rest. Outside the United States and the UK the numbers and rules here do not apply. This page does not cover medical care without an address or insurance, or how to keep your belongings safe from theft.