Throughout Southern California, the bases of mountain ranges are strewn with the effluent of past debris flows — called alluvial fans — and cities in the sprawling Los Angeles basin have been ...

Created by the flood that resulted from the dam breaking at Lawn Lake in 1982, the Alluvial Fan is the debris flow that came down with the water from the lake. It spread out onto the flat meadow ...

A flood watch will go into effect Wednesday afternoon across much of Los Angeles and Ventura counties as weather officials warn about heavy rainfall and debris flows. Several areas in Southern ...