During the Great Chilean earthquake a landslide near the Tralcan Mount dammed the Riñihue Lake. As the water levels of Riñihue rose more than 20 meters, the dam was in danger of breaking and flooding everything downstream, including the city of Valdivia.
During the Great Chilean earthquake, a landslide near Tralcan Mount blocked the Riñihue Lake, causing its water levels to surge more than 20 meters. This put the dam at risk of failure and potential flooding downstream, including the city of Valdivia.