How to Escape a Sinking Car

Summary

• If your car enters water, you have approximately 30–60 seconds before it begins to sink — act immediately by unbuckling your seat belt, opening the window, and climbing out.
• Do not try to open the door until the car is almost fully submerged — water pressure makes it impossible until the pressure equalises inside and outside.
• Break the side window with a dedicated escape tool if electric windows fail — keep one within arm's reach of the driver's seat at all times.

It is a nightmare scenario. Your car leaves the road and enters water. It is rare, but it does happen. Flash floods, icy roads, and misjudged fords can all put a car in deep water. Knowing what to do in advance could save your life.

How Cars Sink

Cars do not sink immediately. Most modern cars will float for 30–120 seconds depending on how sealed the cabin is. This is your window of opportunity to escape.

The engine end sinks first because it is the heaviest part of the car. In most front-engined cars, the bonnet dips below the surface while the boot stays higher.

Water enters through gaps around doors, pedal openings, vents, and the boot seal. As water fills the cabin, the car sinks faster. Once it is fully submerged, it can reach the bottom in seconds.

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Step-By-Step Escape Plan

Follow these steps the moment your car enters water:

1. Stay calm. Panic wastes precious seconds. You have time to escape if you act methodically.
2. Unbuckle your seat belt. Do this immediately. It is the first thing you should do.
3. Open the window. Electric windows may still work for a short time after entering water. Open the window as wide as possible.
4. Help children first. Unbuckle the oldest child first so they can help with younger siblings while you deal with the window.
5. Climb out through the window. Do not waste time gathering belongings. Get out immediately.
6. Swim to the surface. Push away from the car and head towards the surface.
7. Call 999. Once safe on land, call emergency services immediately.

Remember the word SWOC: Seat belts off, Windows open, Out through the window, Children first. This sequence could save your life.

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Why You Cannot Open The Door Underwater

Many people instinctively try to open the car door. This is usually impossible. Here is why:

Water pressure on the outside of the door can exceed 600 pounds per square foot. You simply cannot push against this force. The deeper the water, the greater the pressure.

There are only two situations where the door can open:

• Before the car enters deep water: In the first moments while the car is floating and the water level is below the door.
• When the car is almost fully submerged: Once water fills the cabin and pressure equalises inside and out, the door can open. But by this point, you are underwater.

This is why the window is your best escape route. Always try the window first.

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What If The Windows Will Not Open?

Electric windows may fail once water reaches the electrics. If this happens, you need to break the glass.

Use an emergency escape tool. These are small, inexpensive devices (around £5–£15) that include a spring-loaded point for shattering tempered glass and a blade for cutting seat belts.

Tips for breaking the window:

• Aim for the corner of the side window — glass is weakest at the edges.
• Do not try the windscreen. It is laminated glass and will not shatter.
• Cover your face and look away when the glass breaks.
• Clear sharp glass from the frame before climbing through.

Without a tool, breaking a car window with your hands or feet is extremely difficult. Keep an escape tool in the driver's door pocket or clipped to the sun visor.

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Preparation And Prevention

Preparation is your best protection:

• Buy an escape tool. Keep it within arm's reach — not in the glove box or boot.
• Know how your windows work. Practice opening them quickly.
• Do not drive through floods. Just 30 cm of flowing water can float a car. If in doubt, turn around.
• Avoid fords after heavy rain. Water levels can rise rapidly and be deeper than they appear.
• Check weather warnings. Avoid routes near rivers and low-lying areas during flood alerts.

Water Depth	Risk To Vehicles
15 cm (6 inches)	Can stall small cars. Splashes electrics.
30 cm (1 foot)	Can float a car. Loss of control possible.
60 cm (2 feet)	Most vehicles will float and be swept away.

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After Escaping The Vehicle

Once you are out of the car:

1. Swim to the surface and get to dry land as quickly as possible.
2. If there is a current, swim diagonally downstream towards the bank.
3. Call 999 immediately and give your location.
4. Do not re-enter the water to retrieve belongings.
5. Get warm and dry as soon as possible to avoid hypothermia.

If you see someone else's car in water, call 999 straight away. Do not enter the water yourself — swift water is extremely dangerous even for strong swimmers.

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Key Points To Remember

Escaping a sinking car is survivable if you act quickly and calmly. Remember SWOC: Seat belts, Windows, Out, Children.

The most important thing you can do right now is buy an escape tool and keep it in your car. It costs less than a tank of fuel and could save your life. Keep your car in good condition with regular servicing, and always check the MOT status of any vehicle you drive.

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