Severe Erosion Threatens Southern California Homes and Vital Rail Lines

Rising seas, powerful waves and disrupted sediment flows are shrinking Southern California beaches and putting homes and infrastructure at risk. Residents have evacuated in Long Beach and Malibu, homes have been destroyed or threatened in Orange County, and erosion has repeatedly disrupted a major passenger rail line near San Clemente. In San Clemente, officials estimate restoring North Beach could require about 3 million cubic yards of sand, and residents are considering a proposed 1% sales tax to help pay for replenishment; added sand would not stop the underlying erosion. Rock barriers intended to protect the railway have drawn criticism from residents who say they worsen beach loss. Communities also face immediate risks from flooding and landslides as a strong El Niño develops, compounding long-term sea-level rise; experts warn the ocean ultimately cannot be held back.
Transporting enough sand to address San Clemente’s estimated 3-million-cubic-yard shortfall would take about 300,000 truck trips, according to the city manager.
A forecast made nearly a decade ago projected that more than half of Southern California’s beaches could significantly erode by 2100.
A recent study found that El Niño events are growing stronger because of human-caused climate change.
El Niño could bring a potentially multibillion-dollar flood threat to California, with powerful Pacific storms including atmospheric rivers; the heaviest rains typically arrive in winter.
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