Nature's power can be destructive, especially when tons of massive rocks, mud, and debris move down a slope. Landslides in the United States cause approximately $3.5 billion (year 2001 dollars) in damage, and kill between 25 and 50 people annually, according to the U.S. Geological Survey (USGS). Worldwide, landslides cause thousands of casualties and billions in financial losses annually.

The deadliest landslide in U.S. history occurred in northwest Washington on March 22, 2014. Debris from the natural disaster covered at least 40 homes and other structures as well as a major highway. It caused 43 fatalities in the town of Steelhead Haven near Oso, Washington. 

Landslides happen quickly

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Jayleen R. Heft

Jayleen Heft is the digital content editor for PropertyCasualty360.com. Contact her at [email protected].