The Lynmouth flood of 1952 was caused by unprecedented rainfall in the Exmoor region that saturated the ground and led to a rapid surge of water in the Lyn and East Lyn rivers. The rivers, whose channels had been narrowed by development, overflowed their banks and swelled to over 40 feet high, destroying 90 homes, 130 vehicles, and killing 34 people in Lynmouth. Extensive flood management efforts since then, such as widening river channels, building embankments, and planting trees upstream, aim to mitigate future flooding risks.