Science In Action: El Niño Preparations

Stay informed. Know the risks. Be prepared.

El Niño historically increases the odds of above-normal rainfall in some parts of the state, which can increase landslide risks.

The California Geological Survey (CGS) uses geological mapping, landslide assessments, and rainfall information to help identify hazards and inform safer decisions. Learn about the work being done to keep Californians safe.

Science in Action

• Our CGS team has staff who specialize in landslide hazards and mitigation. If rainfall trends above average, or if multiple storms occur back-to-back, the risk of overly saturated rock and soil on steep slopes increases the risk of landslides and debris flows. CGS scientists study data and trends to suggest infrastructure improvements that can reduce risk to both property and life. Visit the CGS Landslides page for more information about landslides and landslide hazards in California.

• The Burned Watershed Geohazards (BWG) Program helps California communities prepare before and after natural hazards by providing maps, data, and rapid burned watershed assessments. Areas that have recently experienced wildfires are at higher risk for landslides and debris flows, and this program helps assess that risk in order to provide mitigation recommendations.

• Stay informed - it's important for Californians to learn how to spot landslide warning signs and know what to do in the event of a landslide in your area. Check out this resource from the CGS website to learn more about the science behind landslides and what you can do to prepare for them.

• Want to know more about how the El Niño cycle works? Learn about the El Niño-Southern Oscillation (ENSO), consisting of the El Niño and La Niña phases as well as neutral conditions where neither are present, including how they can affect rainfall patterns in California, and thus landslide impacts to California communities. Visit the CGS El Niño page for more information.

It's never too late to prepare for El Niño! Learn what steps you can take at ready.ca.gov.