One Dead, Two Missing After Pontoon Boat Sinks Near Alcatraz Island in San Francisco Bay

A major search-and-rescue operation was underway Tuesday after a recreational pontoon boat carrying 19 people sank in the waters near Alcatraz Island in San Francisco Bay, leaving one person dead, two others missing and 16 rescued. Authorities said the tragedy unfolded in the choppy waters surrounding the former island prison, now one of California’s most visited tourist attractions.

According to the San Francisco Fire Department, emergency crews responded shortly after reports that a three-deck pontoon vessel was in distress approximately 600 yards (about 550 metres) from Alcatraz Island. Fire Chief Dean Crispen said responders found the boat almost completely submerged, with its engine still running and fuel leaking into the bay. Initial reports suggesting the vessel had caught fire were later ruled out after investigators determined there was no evidence of flames.

The vessel had 19 people on board when it began taking on water. Rescue teams managed to pull 16 passengers from the cold waters of San Francisco Bay, but one of those rescued later died from injuries despite emergency medical treatment. Three survivors were taken to hospital, while two people remained missing as divers, helicopters and marine units continued combing the area. A dog that was aboard the vessel also died in the incident.

Witnesses described chaotic scenes as passengers struggled in the rough water. Nearby boat operators rushed to assist before emergency responders arrived, helping pull several people from the bay. Officials said many of the injuries occurred after passengers were thrown into the frigid water, with some reportedly not wearing life jackets.

The rescue effort involved the U.S. Coast Guard, the San Francisco Fire Department, the San Francisco Police Department, Oakland police marine units, rescue divers, helicopters and at least 11 emergency vessels. Search teams focused on strong tidal currents that may have carried the missing passengers away from the accident site.

Authorities said the pleasure boat had reportedly departed from the vicinity of the St. Francis Yacht Club before the accident. The vessel eventually sank into waters estimated to be about 120 feet deep, complicating both rescue and recovery operations. Environmental crews were also monitoring the fuel leaking from the submerged boat.

Marine experts noted that conditions on San Francisco Bay were particularly challenging, with strong winds and waves estimated between four and six feet. Such conditions can make navigation difficult for recreational pontoon boats, which are generally designed for calmer inland waters rather than the open bay. Investigators will examine whether weather, mechanical failure, loading or other factors contributed to the sinking.

The U.S. Coast Guard has launched an investigation into the accident to determine the exact cause of the sinking. Authorities have not yet released the identities of the deceased or the missing, pending notification of their families. Search operations were expected to continue as long as conditions remained safe for rescue personnel.