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Types of Flooding
River flooding (fluvial): this occurs when a river cannot cope with the amount of water entering it.
Coastal flooding: weather and tidal conditions can increase sea levels.
Surface water flooding (pluvial): this happens when there is heavy rainfall on ground that is already saturated, or on paved areas where drainage is poor.
Groundwater flooding: when rainfall causes the water that is naturally stored underground to rise to the surface it can flood low-lying areas.
Drain and sewer flooding: this can occur during heavy rain when drains have become blocked or full.
Broken water mains flooding: burst water mains can cause flooding underground and to basements of properties.
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