Southern California braces for another coastal threat as cities assess storm damage

Southern California coastal communities are assessing flooding and erosion damage while officials warn that a coastally trapped Kelvin wave moving up Mexico’s coast could soon bring another round of dangerous conditions.

Homes from south Orange County to Malibu were flooded and badly damaged, and erosion hit stretches of shoreline from Carlsbad to Long Beach. Laguna Beach, Dana Point and Carlsbad declared local emergencies last week after a south swell linked to Hurricane Marie caused coastal erosion and sand loss.

Orange County activated its emergency operations center after multiple city emergency declarations. County officials said coastal cities were dealing with serious damage, while transportation officials posted video showing erosion threatening the Metrolink rail line in San Clemente. In Carlsbad, city officials said the emergency declaration was aimed at protecting Carlsbad Boulevard, also known as Old Highway 101, from severe erosion.