The hazardous conditions pose significant risks to beachgoers, including the potential for injury or drowning. Sneaker waves can knock people off their feet and drag them into the ocean, while rip currents are a leading cause of beach rescues and fatalities. Even experienced swimmers are at risk. According to NOAA, rip currents account for over 80% of beach lifeguard rescues in the U.S., and more than 100 fatalities occur annually due to these hazards. The warning comes as warmer weather draws more visitors to California's beaches, increasing the likelihood of accidents.