The ongoing showers may disrupt outdoor Labour Day activities, particularly in Los Angeles and Ventura counties. Coastal areas face significant risks, including strong rip currents, large breaking waves, and potential flooding in low-lying areas such as parking lots, beaches, and walkways. The Alamitos Peninsula in Long Beach is highlighted as a particularly vulnerable area, with structural damage reported during high tide. Swimmers, surfers, and small boat operators are at heightened risk due to hazardous ocean conditions.