Full Breakdown
El Niño-Driven Coastal Erosion Threatens Southern California Shoreline
By Drooid · · How we work
Escalating Coastal Erosion Along the Southern California Coast
An intensified El Niño pattern, a lingering marine heat wave, and unusually high tides are producing powerful wave energy that is eroding bluffs, beaches and infrastructure across Southern California. Sea level has been about six inches above normal since early spring and is projected to rise another six inches as El Niño peaks later this winter. The wave action is already undermining roadways, homes and public facilities in Malibu, Laguna Beach, Long Beach, Dana Point and Carlsbad.
Background & Context
El Niño amplifies storm activity in the northeastern Pacific, generating larger swells that strike the coast during high tide. While El Niño is a natural climate pattern, it is occurring within a warming climate that may produce record-strength events. Early-20th-century jetty construction at Newport Beach has shaped local wave dynamics, making “the Wedge” particularly vulnerable to high-energy swells.
Key Figures & Groups
- Brett Sanders – Chancellor’s Professor of Civil and Environmental Engineering, UC Irvine.
- Alexander Gershunov – Climate researcher, Scripps Institution of Oceanography, UC San Diego.
- Adam Young – Coastal geomorphologist, Scripps Institution of Oceanography.
- Geoff Patnoe – City Manager, Carlsbad.
- Don Webb – Former Newport Beach mayor and retired public works director.
Data & Statistics
- Sea level has remained roughly six inches above normal since March and is expected to increase by a comparable amount before winter’s end.
- About 20 ocean-front homes were evacuated in a Long Beach neighborhood after powerful swells accelerated erosion.
- Existing revetments installed in 2009, 2015 and 2016 show emerging cracks, though the protected roadway remains stable for now.
Official Statements & Responses
Local officials have declared emergencies to fast-track coastal stabilization. The Carlsbad administration highlighted a monitoring program aimed at identifying infrastructure risks before they become critical. State authorities warned that higher sea levels, lunar-solar tide cycles and potential winter storms could deliver unprecedented wave energy to the shoreline.
On-the-Ground Reports
Residents report sand loss that has exposed foundations and threatened access roads. In Long Beach, emergency crews assisted families in relocating from vulnerable properties. The sinkhole incident involving a Hollywood actor’s home drew national attention to the immediacy of the threat.
Verbatim Quotes
- “We need to be in the highest level of preparedness. This is likely to be the most stressful winter we have had in a number of years in terms of waves,” — Brett Sanders
What’s Next
Scientists project the strongest El Niño-related wave activity will occur during winter months when tidal peaks align with storm surges. Municipalities plan to evaluate revetment integrity and consider additional shoreline nourishment projects before the anticipated peak.