"Eighty-eight years ago, the St. Francis Dam burst in the middle of a March night, killing nearly 500 people. There are some images of the aftermath, but numbers tell the story better: 12.4 billion gallons of water rising to the furious..."
http://www.newsweek.com/2016/04/22/st-francis-dam-disaster-los-angeles-warning-engineering-445915.html