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Landslide and Debris Flow
Landslides, also known as mudslides and debris flow, occur in all U.S. states and territories, and can be caused by a variety of factors including earthquakes, storms and fires. Landslides can occur quickly, often with little notice, the best way to plan for a mudslide is to stay informed about changes in and around your school that could signal that a Landslides is likely to occur.
Once triggered, a mudslide can accelerate up to a speed of 10-35 miles an hour. As it picks up speed, it picks up mass-along with most everything in its path. Once an area has been hit with a slide, it's likely to get recurring ones. Therefore, residents should be alert to conditions and have a Classroom Emergency Plan and a "to-go" bag handy in case evacuation is necessary.
Residents should not build near steep slopes, mountain edges, drainage ways, or valleys created by erosion. You also need to get a ground assessment of your property, research the surrounding areas, and learn how to recognize landslide and mudslide warning signs. Learn about ways to minimize damage, for instance by building retaining walls or channels to divert flows, and by planting ground cover on slopes.
Download Landslide and Mudslide Checklist (pdf)
- www.ready.gov: Landslides and Debris Flow
- FEMA Landslide and Debris Flow preparedness
- US Geological Survey
States affected:
Alaska
California
Colorado
Hawaii
Kentucky
Montana
Nebraska
Utah
Washington