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Destructive waves of mud sliding down barren hillsides in Southern California slammed everything in sight.
The force of the mudslides was so massive that it destroyed homes, uprooted trees and washed away dozens of cars Tuesday.
Hundreds of first responders in Santa Barbara County waded through waist-high mud while others flew over the devastation searching for survivors.
As of Wednesday, 15 people had been killed and more than 160 others were injured.