Why Prepare?

Basic Preparedness
Getting Informed
Planning and Checklists
Special Needs
Disaster Supplies Kit

Natural Hazards
Thunderstorms and lightning
Winter storms and extreme cold
Extreme heat
Landslides and debris flow

Technological Hazards
Hazardous materials incidents
Household chemical emergencies
Nuclear power plant emergencies

Biological threats
Chemical threats
Nuclear blasts
Radiological dispersion device events

Recovering from Disaster
Health and safety guidelines
Returning home
Seeking disaster assistance
Coping with disaster
Helping others

Landslide and Mudslide
In a landslide, masses of rock, earth or debris move down a slope. They are activated by storms, earthquakes, volcanic eruptions, fires and human modification of land.
Debris and mud flows are rivers of rock, earth and other debris saturated with water. They develop when water rapidly accumulates in the ground, during heavy rainfall or rapid snowmelt, changing the earth into a flowing river of mud. They flow rapidly, striking with little or no warning at avalanche speeds. They also can travel several miles from their source, growing in size as they pick up trees, boulders, cars and other materials.
Landslide problems can be caused by land mismanagement, particularly in mountain, canyon and coastal regions. Land-use zoning, professional inspections and proper design can minimize many landslide, mudflow and debris flow problems.

Take Protective Measures
What can I do Before a Landslide or Debris Flow?

Do not build near steep slopes, close to mountain edges, near drainage ways or natural erosion valleys

Get a ground assessment of your property

Consult an appropriate professional expert for advice on corrective measures

Minimize home hazards by having flexible pipe fittings professionally installed to avoid gas or water leaks, as flexible fittings are more resistant to breakage

Recognize Landslide Warning Signs
Changes occur in your landscape such as patterns of storm-water drainage on slopes, land movement, small slides, flows or progressively leaning trees

Doors or windows stick or jam for the first time

New cracks appear in plaster, tile, brick or foundations

Outside walls, walks or stairs begin pulling away from the building

Slowly developing, widening cracks appear on the ground or on paved areas such as streets or driveways

Bulging ground appears at the base of a slope

Water breaks through the ground surface in new locations

Fences, retaining walls, utility poles or trees tilt or move

A faint rumbling sound that increases in volume is noticeable as the landslide nears

The ground slopes downward in one direction and may begin shifting in that direction

Unusual sounds might indicate moving debris

Collapsed pavement, mud, fallen rocks and other indications of possible debris flow can be seen when

What do I do During a Landslide or Debris Flow?

Move away from the path of a landslide or debris flow as quickly as possible

Curl into a tight ball and protect your head if escape is not possible

What do I do After a Landslide or Debris Flow?

Stay away from the slide area

Check for injured and trapped persons near the slide, without entering the direct slide area

Watch for associated dangers such as broken electrical, water, gas, sewage lines and damaged roadways and railways

Replant damaged ground as soon as possible since erosion caused by loss of ground cover can lead to flash flooding and additional landslides in the near future

Seek advice from an expert for evaluating landslide hazards or designing corrective techniques to reduce landslide risk
Follow the instructions for returning home.