From the United States Coast Guard, Sector Humboldt Bay:

U.S. Coast Guard Sector Humboldt Bay responded Thursday to a report of a capsized 19-foot pleasure craft with four people aboard near the Humboldt Bay South Jetty.

The Coast Guard received a report that the vessel was swept into the jetty, began taking on water, and capsized shortly after, stranding the four boaters on the jetty rocks. A rescue helicopter from Sector Humboldt Bay, a 47-foot motor lifeboat from Coast Guard Station Humboldt Bay, and Emergency Medical Services were dispatched to the scene to assist. 

Coast Guard crews maintained a safety zone and aided EMS personnel in locating the boaters on the rocks. EMS confirmed three survivors with minor injuries and one deceased. 

The vessel sank after capsizing and is no longer visible in the water.