PITTSBURG (CBS SF) — A firefighter was injured battling a three-alarm fire that was burning at a roofing supply business on Piedmont Way in Pittsburg, officials said.

The first call came in at 2:39 p.m. and the fire quickly elevated to a second and third alarm.

The blaze, clearly visible from Highway 4, spread to a structure at the Elite Roofing Supply Company and then ignited grass across the nearby abandoned train tracks.

A huge plume of smoke was visible, a spokesman said.

Both the structure fire at the lumber yard and the grass fire were contained at 4:05 p.m., according to Contra Costa Fire officials.

The injured firefighter was listed in moderate condition and was treated for smoke inhalation and transported to a local hospital. The firefighter was released around 9:30 p.m. Sunday evening in good condition, officials said.

Contra Costa Fire said the fire originated in a homeless encampment on the north side of the lumber yard. Officials are investigating the cause of the fire.

According to CHP Contra Costa, firefighters were battling the blaze from the slow lane of Highway 4. The far right eastbound lane was closed due to the fire.

Piedmont Way was reopened around 7:45 p.m.

The fire caused some concern Sunday for the air quality in the area due to the chemicals in the material that caught fire.

“We have called county health to make some assessments as to the air quality,” said Steve Hill, public information officer for Contra Costa Fire.

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