SEAL BEACH, Calif. (AP) — Thundering surf spawned by a Pacific hurricane pounded the Southern California coast Wednesday, causing minor flooding in a low-lying beach town, knocking pilings from under the Malibu Pier and drawing daredevil surfers and body-boarders into churning waves as crowds of spectators lined the shore.

Residents of about four blocks of homes along Seal Beach, south of Los Angeles, swept seawater out of ground-floor rooms after flooding overnight.

With the next high tide looming near midday, bulldozers worked to reinforce a 6-foot-tall sand berm created to protect homes and shoreline facilities — a measure normally not needed until winter.

Despite the danger, surfers and body-boarders flocked to favored spots such as the notorious Wedge at Newport Beach and Surfrider in Malibu, where a surfer died Tuesday after being pulled from the water. It was not clear whether the death was related to the surf or a medical condition.

Extra lifeguards were on duty and there were repeated rescues.

"It's very hectic, stormy and dangerous, really," said Scott Bosco, 26, who surfed Seal Beach for an hour but only managed to catch two waves because of the roughness. "You live for days like this. I'm definitely coming back later after school."

The towering waves and rip currents were being produced by swells generated by Hurricane Marie in the Pacific Ocean about 800 miles west of the southern tip of Mexico's Baja California peninsula. Although Marie will likely weaken to tropical storm levels, life-threatening water conditions were expected to continue through Thursday.

Along the long arc of Southern California coastline, high surf warnings were posted for Los Angeles County south through Orange County, with lesser beach-hazard advisories down to San Diego and as far northwest as San Luis Obispo County on the state's central coast. The fiercest surf primarily affected south-facing beaches.

At one point in Seal Beach, a lifeguard climbed from the beach to the deck of the pier, sprinted to the end and dove in to rescue a swimmer. That man was successfully brought ashore well down the beach. Orange County Fire Authority Capt. Steve Concialdi said the man was OK.

Along the shoreline, firefighters went door to door, dropping off more sandbags for residents and surveying damage after the initial surge that arrived late Tuesday and topped a 2 1/2 foot beach wall, causing flooding in or around the first row of homes. About 100 residences were affected, Concialdi said.

"This is our worst summer storm and I've been here 42 years," said resident Jerry Rootlieb, who was sweeping out his home on Wednesday.

Jaime and Blanca Brown's seaside home had a foot of seawater throughout the home, garage and carport. Soaked floor tiles in the hallway were buckled, and a dirty line marked the high point of water in almost every room and the garage. Sodden mattresses and carpets were stacked outside.

"What can you do, man? We are just trying to win the war and we're just bringing out water. Water, water, water," said the Browns' nephew, Hector Brown.

A mile north, overnight waves topped a berm protecting the Peninsula neighborhood of Long Beach, but there was only minor street flooding, according to Fire Department spokesman Jake Heflin.

At the Wedge, a famous spot where the interaction of swells and a jetty produce gigantic waves, a huge crowd watched surfers take on ferocious waves for a second day. Lifeguards dove into the surf there as well to save a person with the help of a rescue boat.

Some 60 miles to the northwest, the Malibu Pier was closed after seven pilings were knocked loose. State Parks Department official Craig Sap said rangers noticed three more pilings missing Wednesday. The pier's structural integrity remained sound because of redundancy but people were asked to stay away, he said.

A pier at Port Hueneme in Ventura County also lost pilings as it was topped by waves, said city spokeswoman Michelle Ascencion. That pier has been closed since April.

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Associated Press writer Christopher Weber contributed from Los Angeles.