SANTA CRUZ, Calif. — Persistent high surf and flooding threats along California’s coast have residents on high alert a day after a major storm was blamed for one man’s death and the partial collapse of a pier, which propelled three people into the Pacific Ocean.

The National Weather Service on Christmas Eve warned of dangerous, large-breaking waves of up to 35 feet (10.7 meters). Its latest high surf warning will be in effect until 6 p.m. Tuesday.

“Large waves can sweep across the beach without warning, pulling people into the sea from rocks, jetties and beaches,” the weather service said in a Christmas Eve bulletin.

Some California cities ordered beachfront homes and hotels to evacuate early Monday afternoon as forecasters warned that storm swells would continue to increase throughout the day.

In Watsonville along the Monterey Bay, first responders were called to Sunset State Beach, a state park, around 11:30 a.m. Monday for a report of a man trapped under debris. The Santa Cruz County Sheriff’s Office believes a large wave pinned him there. The man was pronounced dead at a hospital.

The storm’s high surf also likely pulled another man into the Pacific Ocean around noon Monday at Marina State Beach, nearly 13 miles (21 kilometers) south of Watsonville, authorities said. Strong currents and high waves forced searchers to abandon their efforts roughly two hours later as conditions worsened. The man remained missing Monday evening.

In Santa Cruz, a municipal wharf under construction partially collapsed and fell into the ocean around 12:45 p.m., taking three people with it. Two people were rescued by lifeguards and a third swam to safety. No one was seriously injured.

“We are anticipating that what is coming toward us is more serious than what was there this morning,” Santa Cruz Mayor Fred Keeley said Monday.

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Portion of Wharf Damaged Over Time

Keeley said that section of the wharf had been damaged over time. The structure was in the middle of a $4 million renovation following destructive storms last winter about 70 miles (112 kilometers) south of San Francisco.

“It’s a catastrophe for those down at the end of the wharf,” said David Johnston, who was allowed onto the pier to check on his business, Venture Quest Kayaking.

Tony Elliot, the head of the Santa Cruz Parks & Recreation Department, estimated that about 150 feet (45 meters) of the end of the wharf fell into the water. It was immediately evacuated and will remain closed indefinitely.

Some of the wharf’s pilings are still in the ocean and remain “serious, serious hazards” to boats, the mayor said. Each piling weighs hundreds of pounds and is being pushed by powerful waves.

“You are risking your life, and those of the people that would need to try and save you by getting in or too close to the water,” the National Weather Service’s Bay Area office said on the social platform X.

The end of the Santa Cruz Wharf that broke off had been shut down during renovations. The portion, which included public restrooms and the closed Dolphin restaurant, floated about half a mile (0.8 kilometers) down the coast and wedged itself at the bottom of the San Lorenzo River.

Those who fell into the water were two engineers and a project manager who were inspecting the end of the wharf, officials said. No members of the public were in the area.

Building inspectors were looking at the rest of the pier’s structural integrity.

In a post on X, the National Weather Service office in Portland, Oregon, said, “It will likely go down as some of the highest surf this winter.”