A barrier lake caused by a mudslide overflowed a dam and submerged two villages in southern China.<br /><br />The drone video, filmed in Danba County in Sichuan Province on June 17, shows a car being washed away and houses collapsing into the floods.<br /><br />According to reports, over 20,000 people have been evacuated and two people have been reported missing.<br /><br />A landslide dam or a barrier lake is a natural damming of a river formed by landslides or volcanic eruptions.<br /><br />The video was provided by local media with permission.
