Zaire Watu Fairley of Vallejo was at the reservoir with three friends and told the Napa County Sheriff’s Office that Fairley was standing on a log and slipped into the water at about 1:35 p.m., according to a news release. An off-duty police officer was on the lake in a boat and dove into the water to save Fairley, the sheriff’s office said. The officer found Fairley underwater and pulled him to shore where off-duty nurses performed CPR. A California Highway Patrol helicopter took Fairley to Queen of the Valley Medical Center in Napa, where he died at 3:19 p.m., the sheriff’s office said. A San Pablo man drowned July 3 while rescuing his son in the water at the reservoir, the sheriff’s office said in a Facebook post. Marciallo Perez, 35, was unable to swim back to shore after helping his son, who survived. Five days earlier, on June 27, Demetrio Perriatt, 16, drowned in the lake while retrieving his raft. Since 2020, there have been 11 drownings in Lake Berryessa, the sheriff’s office said. Seven of those 10 drownings occurred in Oak Shores Daily Use. “If you are going in or near water, wear a life jacket,” the sheriff’s office said. “Life jackets save lives.”