If you have to pass through floods or standing water as part of your journey:
• Where possible, try and find an alternative route – it may take longer but it should be safer.
• Avoid driving through moving flood water that’s more than 4 inches (10cm) high. Fast-moving water can be deceptively powerful and could sweep your car away in the worst instances.
• Water levels can change quickly, especially in heavy rain.
• It only takes a small amount of water to wreck your engines, and as many car engines’ air intake is low down on the front of the car - driving headfirst through high water can be incredibly risky (and expensive).
• When passing through water, let approaching traffic go first, then drive slowly – if you create too much of a bow wave or a splash, you’re going too fast.
• Flood or standing water can make it much harder to see the kerb, or other hazards like potholes or speedbumps, so it’s important to drive slowly and be aware.
• Be aware of other hazards, such as manhole covers lifted by water or other debris floating.
• If you drive fast enough to splash water onto pedestrians or cyclists on the pavement, then you could be fined and get points on your licence.
• As soon as you have passed through the water, test your brakes to make sure they’re working correctly.
Related: How to spot a flood damaged car.