Coastal flooding - extreme weather conditions combined with high tides can cause sea levels to rise above normal, force sea water to the land and cause coastal flooding.
River flooding - heavy rain causes a river to burst its banks and flood the surrounding areas.
Groundwater flooding - prolonged rainfall causes water levels underneath the ground to rise above the surface.
Surface water flooding - rainwater does not drain away through the normal drainage systems or soak into the ground, but lies on or flows over the ground instead.
Sewer flooding - the sewer's capacity is reached and sewage begins to overflow.
Flash flooding - fast-moving and unexpected flooding.
