Salt Lake Fire Capt. Karleen Montanez said two engine crews continued to work Sunday afternoon to contain a four-alarm blaze that broke out Saturday night at a pallet business in west Salt Lake.

Montanez said the blaze is mostly contained, however one metal building at the site continues to be too hot to enter and crews are still dousing flare-ups. Investigators continue to speculate that sparks from a passing train caused the fire.

About 100 firefighters responded to the fire Saturday night that, at one point, had flames reaching 100 feet and was fueled by burning pallets, trailers and exploding propane tanks.

Montanez said the owner of the business, Central Pallet near 850 South and 4400 West, estimated damages between $1.5 and $2 million.

Montanez said the circumstances of the incident are nearly identical to a fire that occurred at the same business, also believed to have been ignited by train-caused sparks, almost exactly two years ago. Montanez didn't know if the business owners had made any fire-prevention changes following the 2006 blaze.