PINE GROVE, Pa. -

Sparks from a demolition crew's tool sparked an inferno that eventually destroyed a building being torn down, officials said.

The fire started around 1 p.m. Monday in the building that once housed a sewing factory and a bottling plant at 18 Spruce St. in Pine Grove, Schuylkill County.

Workers were using a grinder to remove bolts from steel beams when sparks ignited some scaffolding, and the flames quickly extended to the building, investigators said Tuesday.

The blaze rose to three alarms, drawing a response of firefighters from throughout Schuylkill County and neighboring Berks County.

One firefighter was treated for heat exhaustion; another suffered a cut on an arm from falling glass, officials said.

Images: Flames destroy old warehouse being demolished

Published: Jun 02 2014 03:31:46 PM EDT   Updated On: Jun 02 2014 03:55:49 PM EDT

A three-alarm fire destroyed an old warehouse in Pine Grove, Schuylkill County, on Mon., June 2, 2014. Story: 3-alarm fire destroys building being demolished in Pine Grove

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Margaret Hoy