An earthquake in 1965 triggered the failure of six dams, two of which released millions of tonnes of water and debris that wiped away the town of El Cobre in the Valparaiso Region of Chile. In 1965, Hurricane Betsy flooded large areas of New Orleans, Louisiana, United States, for up to 10 days, drowning around 40 people. In 1966, the flood of the Arno River killed dozens of people and damaged or destroyed millions of masterpieces of art and rare books in Florence, Italy.