mud flow, 土石流

A mud flow skirts a house protected with sandbags in Monrovia, California, Jan. 6, 2016. A wildfire two years ago stripped away vegetation and loosened soil.
January 7, 2016
http://www.voanews.com/media/photogallery/january-7-2016-day-in-photos/3135445.html

Mudflow - Wikipedia, the free encyclopedia

土石流