SAN FRANCISCO—A fire engulfed a warehouse on San Francisco’s Fisherman’s Wharf early Saturday, sending a thick plume of smoke over the waterfront and threatening to spread to a historic World War II-era ship before firefighters brought the flames under control.

Fire officials work in front of a sign for Musee Mecanique after a fire broke out before dawn at Fisherman's Wharf in San Francisco, Saturday, May 23, 2020. Jeff Chiu/AP photo