Flood water is deceptive. It hides road damage, debris, and depth, and moving water exerts far more force than most drivers expect.
The safest advice is simple: if you cannot see the road surface, do not drive through it.
Why flood water is dangerous
Even shallow moving water can push a car sideways or float it. If water is drawn into the engine through the air intake, it can cause hydrolock, bending internal parts and destroying the engine. Electrics, brakes, and interiors can also be damaged.
If you must drive through standing water
- ▸Check the depth first — watch other vehicles or find a marker
- ▸Drive slowly and steadily in first gear to avoid a bow wave
- ▸Stick to the highest part of the road
- ▸Do not stop in the water
- ▸Test your brakes gently once you are through
If the engine stalls
Do not try to restart it — this is when water can do the most damage. If it is safe, leave the car and move to higher ground. Call for recovery.
After the car has been in water
Have it inspected before driving. A garage should check the air filter, oil for a milky appearance, brakes, wheel bearings, and electrics. Contact your insurer early; flood-damaged cars are often written off if water reached the interior.
CAUTION: This is general automotive information, not professional mechanical advice. Always follow your vehicle manufacturer’s specifications and service schedule, and have brakes, steering, tyres, and other safety-critical systems inspected by a qualified mechanic.