An El Niño–linked “Kelvin wave” is moving toward and along the Southern California shoreline, a pattern that is expected to raise sea levels and increase the risk of coastal flooding and beach erosion. Multiple outlets report that the wave is driven by a large pulse of ocean energy and could affect conditions across the West Coast for an extended period.
Context comes from the broader seasonal outlook: an El Niño pattern is already forecast to influence the Pacific and alter storm impacts later this year. TIME describes the event as wave energy traveling up the West Coast, while Live Science emphasizes that the elevated sea-level disturbance could persist for months and worsen damage from predicted winter storms. The Los Angeles Times focuses on what residents may experience along the shoreline, including boosted flooding risk and erosion during coastal high-water events.