Last: The Sierra Madre Dam is one of many structures emergency officials ... And those broad alluvial fans are expert at what geologists call entrainment — water, mud, sediment and boulders coalesce ...
Although the rain has stopped, the challenging recovery is just beginning for homeowners in Sierra Madre ... at speeds of 50 miles per hour, carried boulders that could be heard crashing through ...
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Crushed by boulders, drowned in mud: How debris flows endanger LA’s fire-ravaged communitiesNearly 170,000 people live in Altadena, Pasadena and Sierra Madre at the foot of the ... fire-scarred hillsides unleashing torrents of mud, boulders and debris from the torched slopes.
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