Beach erosion in Southern California is causing structural instability and economic strain. High tides and storm surges have damaged homes, roads, and railways, with some areas facing indefinite closures. The Pacific Coast Highway and rail lines near San Clemente are particularly affected, disrupting transportation and commerce. Coastal towns like Newport Beach and Long Beach have seen significant property damage, while historic landmarks such as the Long Beach Peninsula boardwalk have been partially destroyed. The escalating costs of sand replenishment and infrastructure repair are expected to burden local governments further.