Santa River - Natural Hazards

Natural Hazards

The Santa Valley has always experienced severe disasters. Beginning in 1702 when a glaciological flood is first recorded, the valley has repeatedly suffered deaths and destruction. In 1941, a flood destroyed one-third of Huaraz, killing 5,000 to 7,000 people. In 1962, a massive avalanche of ice and rocks tumbled down from the western slopes of Huascarán and then roared down the river valley. The Santa River rose by eight metres and 3,000 to 4,000 people were killed in the catastrophe. Devastating landslides ("aluviones") like these will aways threaten the region, when falling glacial ice triggers sudden drainages of ice-dammed lakes in the mountainous region and liquid mud, blocks of ice and large rock boulders crash down the narrow valleys.

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