At least 81 people are killed in the most devastating flood in the history of the Spanish city of Valencia.

A flood on 14 October 1957 in Valencia, Spain, resulted in significant damage to property and caused the deaths of at least 81 people. In response to the tragedy, the Spanish government devised and enacted the Plan Sur, which rerouted the city's main river, the Turia.

Valencia, formally València, is the capital of the province and autonomous community of the same name in Spain. It is located on the banks of the Turia, on the east coast of the Iberian Peninsula on the Mediterranean Sea. It is the third-most populated municipality in the country, with 825,948 inhabitants. The urban area of Valencia has 1.5 million people while the metropolitan region has 2.5 million.