The beach seemed to be disappearing because of sea level rise, he said. We saw evidence of sea level rise, but also realized that something else was responsible for amplifying and accelerating the seawater’s inland movement with unprecedented magnitude. The rapid housing development in coastal areas close to the beach plays a major role. Over time, the massive urban development along Southern California beaches has contributed to erosion of its coasts. The shoreline is intruding inland, making it appear like the sea level is rising.
Source: The North Africa Journal January 19, 2020 10:52 UTC