Heavy rain reduces grip, visibility, and the ability of other drivers to see you. The first rain after a dry spell is especially slippery as oil and dust lift from the road.
Most rain-related crashes come from driving too fast for the conditions.
Aquaplaning
Aquaplaning happens when a layer of water builds up between tyres and the road, so the tyres lose contact. Steering goes light and the engine may rev as wheels spin. If it happens, ease off the accelerator gently, hold the steering straight, and do not brake hard until grip returns. Good tread depth and correct pressures reduce the risk.
Visibility
- ▸Use dipped headlights so others can see you
- ▸Keep wipers in good condition
- ▸Use air conditioning to demist windows quickly
- ▸Use rear fog lights only if visibility is seriously reduced
Speed and distance
Stopping distances can double in the wet. Leave at least a four-second gap. Avoid cruise control, which can react poorly if you aquaplane. Watch for spray from lorries, which can blind you briefly.
Standing water
Slow down before puddles, not in them, and avoid driving through deep water. See our flood water guide. After driving through water, test your brakes gently.
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.