The massive waves pose significant risks, including life-threatening swimming conditions and severe beach erosion. High tides, amplified by El Niño-warmed seas, may cause waves to break farther up the beach, increasing the risk of damage to coastal areas. Beaches with steep underwater cliffs, such as Maverick's in Half Moon Bay, could see waves exceeding 60 feet, while other beaches may experience waves over 25 feet. The conditions are hazardous for both professional and amateur surfers, as well as beachgoers. Officials have urged the public to avoid the ocean and beaches during the storm to prevent accidents.