Seems the tallest dam in the US is on the verge of letting go any minute now out in California. The emergency overflow has never been used till now and it's crapping out with a quickness as the earth underneath it is eroding. Maybe the top 30 ft of the lake could suddenly drain. They are evacuating.
http://abc7news.com/news/evacuation-order-issued-after-oroville-dam-predicted-to-fail/1751364/
http://abc7news.com/news/evacuation-order-issued-after-oroville-dam-predicted-to-fail/1751364/