Huge San Francisco fire destroys six-story apartment project

San Francisco --

A fast-moving fire that consumed a large apartment building under construction in San Francisco's Mission Bay neighborhood burned into the night Tuesday, but firefighters were able to keep the blaze from spreading to nearby structures.

The five-alarm fire engulfed the building on Fourth Street near China Basin Street just before 5 p.m., sending black smoke thousands of feet into the sky. Scaffolding melted as chunks of the six-story, 80-foot-tall building fell away. Fire Chief Joanne Hayes-White called it the city's largest blaze in several years.

Fire officials said the structure was likely to collapse.

"The open construction of the building allowed for rapid fire spread," said fire Capt. Matthew McNaughton, adding that investigators have not determined what started the blaze.

Nearby buildings were evacuated as more than 150 firefighters battled the flames, using about 90 fire trucks and other apparatuses. The roof of UCSF's Mission Bay research building, a block away, briefly caught fire, but it was quickly put out, McNaughton said.

One firefighter suffered minor burns, he said, but there were no other injuries.

The smoke "was like a huge mushroom cloud. It was as high as a plane," said Gary "Slim" Forte, 38, who was among a large crowd of locals watching the fire. "It looked like somebody blew a nuclear weapon."

Several dozen residents were evacuated from the Strata apartment building across Fourth Street from the construction site, and about 25 were gathered late Tuesday at an American Red Cross evacuation center at Pier 54.

Firefighters still had not contained the blaze by 10:15 p.m. McNaughton said he expected crews to remain on scene until the morning. "We have a center core that looks like a volcano," he said.

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Huge San Francisco fire destroys six-story apartment project