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A woman stands in a rut eroded by water, on a very steep hill surrounded by burned trees.
Burned, denuded hillside in the CZU Lightning Complex
Burned, denuded hillside in the CZU Lightning Complex
Burned, denuded hillside in the CZU Lightning Complex

The USGS landslide team monitors and continues to update the hazard map models based on data collected in burn areas. This information improves future models and provides better hazard assessments used by officials for emergency response and decision making. Many of the steep hillsides burned and denuded in California fires repel water rather than soak it in.

The USGS landslide team monitors and continues to update the hazard map models based on data collected in burn areas. This information improves future models and provides better hazard assessments used by officials for emergency response and decision making. Many of the steep hillsides burned and denuded in California fires repel water rather than soak it in.

A view from the sky of a winding coastal road that runs along steep, rocky cliffs, with a section washed out and collapsed.
Highway 1 washout at Rat Creek
Highway 1 washout at Rat Creek
Highway 1 washout at Rat Creek

The atmospheric river, a narrow, powerful track of water vapor that can deliver tremendous volumes of rain, hit the central California coast and stalled there between January 26 and 28, 2021 — with catastrophic consequences.

The atmospheric river, a narrow, powerful track of water vapor that can deliver tremendous volumes of rain, hit the central California coast and stalled there between January 26 and 28, 2021 — with catastrophic consequences.

View from the sky looking down on a road that runs close to the ocean on a steep and rocky cliff.
California Highway 1 north of Wild Cattle Creek
California Highway 1 north of Wild Cattle Creek
California Highway 1 north of Wild Cattle Creek

A two-day rainstorm from January 26-28, 2021 caused numerous mudslides, debris flows, and other issues along California's coastal Highway 1 through Big Sur. This section is just north of Wild Cattle Creek. Mud washed across the roadway from the cliffs in numerous locations along the 70+-mile stretch of this scenic coastal road.

A two-day rainstorm from January 26-28, 2021 caused numerous mudslides, debris flows, and other issues along California's coastal Highway 1 through Big Sur. This section is just north of Wild Cattle Creek. Mud washed across the roadway from the cliffs in numerous locations along the 70+-mile stretch of this scenic coastal road.

View from the sky looking down on a road that runs close to the ocean on a very steep and rocky cliff.
California Coastal Highway 1 in Big Sur south of Rat Creek
California Coastal Highway 1 in Big Sur south of Rat Creek
California Coastal Highway 1 in Big Sur south of Rat Creek

A section of Highway 1 along the California coast in Big Sur with more examples of the numerous debris flows and mudslides that occur following a heavy rain. This section is just south of the Rat Creek debris flow that completely washed out a large chunk of the highway.

A section of Highway 1 along the California coast in Big Sur with more examples of the numerous debris flows and mudslides that occur following a heavy rain. This section is just south of the Rat Creek debris flow that completely washed out a large chunk of the highway.

View from the sky looking down on a road close to the ocean along a steep and rocky cliff, and the road is washed out.
View of Rat Creek debris flow from above
View of Rat Creek debris flow from above
View of Rat Creek debris flow from above

The atmospheric river, a narrow, powerful track of water vapor that can deliver tremendous volumes of rain, hit the central California coast and stalled there between January 26 and 28, 2021 — with catastrophic consequences.

The atmospheric river, a narrow, powerful track of water vapor that can deliver tremendous volumes of rain, hit the central California coast and stalled there between January 26 and 28, 2021 — with catastrophic consequences.

View from a plane over the ocean looking at a coastal cliff region with a newly engineered roadway cut along it.
Repaired section of California Highway 1 at Mud Creek
Repaired section of California Highway 1 at Mud Creek
Repaired section of California Highway 1 at Mud Creek

On May 20, 2017, this section of the Big Sur coastline experienced a huge landslide that wiped out scenic coastal Highway 1. By July 2018 the roadway was reopened.

Videos

Image of the Week: Mudslide Cuts Through Big Sur Burn Scar
Image of the Week: Mudslide Cuts Through Big Sur Burn Scar
Image of the Week: Mudslide Cuts Through Big Sur Burn Scar

A mudslide near the 2020 Dolan Fire's ignition point chopped through a chunk of California's scenic State Highway 1 in late January. 

The Dolan Fire began near Big Sur on August 18th, 2020. It scarred nearly 125,000 acres before being fully contained in December. 

A mudslide near the 2020 Dolan Fire's ignition point chopped through a chunk of California's scenic State Highway 1 in late January. 

The Dolan Fire began near Big Sur on August 18th, 2020. It scarred nearly 125,000 acres before being fully contained in December. 

UAS Video, July 19, 2017, of the Mud Creek Landslide in Big Sur
UAS Video, July 19, 2017, of the Mud Creek Landslide in Big Sur
UAS Video, July 19, 2017, of the Mud Creek Landslide in Big Sur

The Mud Creek landslide on Big Sur coast, California, occurred on May 20, 2017. USGS Mendenhall researcher Shawn Harrison took this video from an unmanned aerial system (UAS) on July 19, 2017. USGS drone footage shows the slide from many angles.

The Mud Creek landslide on Big Sur coast, California, occurred on May 20, 2017. USGS Mendenhall researcher Shawn Harrison took this video from an unmanned aerial system (UAS) on July 19, 2017. USGS drone footage shows the slide from many angles.

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