Transcript for Monster Waves in Cali Brings Out Gawkers, Rescuers

made fresh Timely tonight, this is what happens when big waves, big danger, and a thirst for adrenaline collide. Today with powerful storms churning off the coast of California, officials warned the crowds to stay out of the water. But that did not stop some adrenaline junkies from hopping in and surfing. And these spectators were lining the beach to watch. And look what happens next. A monster wave comes crashing down. I've never seen such a ling like this ever. This is first time we've had this big a swell this year. And the danger wasn't just on the shoreline. Out on the water with waves reaching an estimated 20 feet, it was treacherous. This is catnip for some surfers, but it creates major hazards for people who have to rescue them. Laird Hamilton helped save a life today. He was happy. He was appreciative. One of several rescues that have kept lifeguards busy. And forecasters predict it's not over yet with those storms still lurking off the coast. The surf will be up until Friday. Two more days of temptation for those surfers. We hope everybody stays safe.

This transcript has been automatically generated and may not be 100% accurate.