(KRON) -- An 8-year-old boy was swept into the ocean near Half Moon Bay while big waves pounded the shoreline on Sunday afternoon, officials said. A Cal Fire battalion chief said the boy was swept in at Cowell Ranch State Beach and an adult tried to save him. When state park lifeguards arrived at 3:13 p.m. Sunday, they found the 39-year-old man and the young boy still in the water, parks officials said. Both victims were pulled onto a harbor patrol boat by lifeguards, and they were rushed to Stanford Medical Center. The boy and man were later pronounced deceased, state parks officials said Monday. "Despite life-saving efforts, the individuals passed away. We extend our deepest sympathy to the family for this devastating loss," California State Parks spokesperson Jorge Moreno wrote. Officials waiting for Moss Landing Power Plant fire to burn out Officials did not release the relationship between the two victims. The National Weather Service Bay Area issued a Beach Hazards Statement between Sunday and Monday for dangerous swimming and surfing conditions. NWS forecasters said there was a "moderate to high risk for sneaker waves" at all Northern California beaches.