Southern California braces for rising sea levels and coastal erosion

Southern California is bracing for rising sea levels and coastal erosion driven by El Niño and an approaching Kelvin wave. Experts, including Dr. Dillon Amaya of North Carolina State University, warn that this Kelvin wave, currently moving along the Mexican coast, is expected to reach Southern California by early October. The wave could raise sea levels by 6 to 12 inches, increasing the risk of coastal flooding and inundation, particularly if it coincides with high tides or storms.

Dr. Amaya noted that the effects of such a rise in the background sea state can be long-lasting, potentially taking three to six months to return to normal.

In response to existing coastal threats, the city of Carlsbad has declared a local emergency to address significant erosion of a coastal bluff supporting Highway 101. The declaration allows the city to bypass lengthy bidding processes to expedite the installation of rock revetments. Similar coastal emergencies have been declared in areas like Laguna Beach, where hurricane-induced swells have damaged seawalls and threatened oceanfront homes.