Coastal flooding poses a significant risk to Malibu, Long Beach, Avalon, and other areas in Los Angeles County. South-facing shores are particularly vulnerable, with potential damage to beaches, coastal walkways, roads, and structures. Dangerous surf conditions and high tides may exacerbate flooding, especially in low-lying areas where drainage could be hindered by accumulating rain. Residents and visitors should remain cautious, as conditions may vary widely, especially on Sunday morning.