Disasters and Emergencies
Landslides and Mudflows
Landslides occur in all U.S. states and territories, and usually strike without warning. The force of rocks, soil, or other debris moving down a slope can devastate anything in its path. Landslides can be activated by:
- Alternate freezing or thawing
- Steepening of slopes by erosion or human modification
- Volcanic eruptions
Landslide problems can be caused by land mismanagement, particularly in mountain, canyon and coastal regions. In areas burned by forest and brush fires, a lower threshold of precipitation may initiate landslides. Land-use zoning, professional inspections, and proper design can minimize many landslide, mudflow and debris-flow problems.