Update: Fire at RWC Machine Shop Controlled

Update: Friday 10:31 a.m.
The fire in Redwood City has been controlled. Residents are advised that it's safe to go outside and there is no health hazard.

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Update: Friday 9:34 a.m.

Firefighters have nearly controlled a six-alarm fire at a machine shop in Redwood City Friday morning, but not before it spread to an adjacent apartment building and displaced more than a dozen residents, a Redwood City fire marshal said.

Firefighters responded at about 5:50 a.m. to the blaze at 894 Douglas Ave., according to a San Mateo County fire dispatcher. FMW Machine Shop is located at that address.

Firefighters had contained the fire as of about 9:15 a.m. but had not yet declared it under control, Redwood City Fire Marshal Jim Palisi said.

Before firefighters could contain the massive blaze, it spread to a nearby apartment building, causing "significant" damage, Palisi said.

About 15 people live in the building and won't be able to return Friday, he said.

Damage to the machine shop was extensive, including the collapse of the building's roof, Palisi said.

According to county officials, the response to the fire has prompted the closure of nearby streets. Broadway is closed in the area and Spring Street is also closed between Sweeney and Hurlingame avenues, county officials said. 
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Update: Friday 8:44 a.m.

San Mateo County health officials are urging community members to exercise caution due to the six-alarm fire in Redwood City.

In a statement e-mailed Friday morning, health officials said, "If you smell smoke, use common sense and avoid smoke by staying indoors or limiting outdoor activity.

"All smoke is toxic and people should decrease or minimize their exposure to smoke. Children, the elderly and those with respiratory conditions are particularly sensitive," the statement reads.

"Other steps people can take to reduce respiratory problems include setting air conditioning units and car vent systems to re-circulate, and if the air smells of smoke, limit your outdoor activities to avoid unnecessary exposure."