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A six-alarm fire burning at Louisville manufacturing facility GE Appliance Park since Friday morning is "controlled but ongoing," according to a city official.

More than 120 firefighters have been battling the massive blaze, which engulfed a building, Chief Kevin Tyler from Jefferson County Fire Service told NBC News.

"The structure has collapsed," he said. "We have 18 different fire districts throughout Jefferson County on the scene."

Fire officials ordered residents within a half-mile of the blaze to shelter in place.

"The Department of Health is on scene and they do not believe there is any toxic chemical risk. The fire is controlled but ongoing. The cause of the fire will be determined when the fire is completely out," said Louisville MetroSafe spokeswoman Jodi Duncan.

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Aerial views showed the facility covered in a billowing plume of black smoke. The thick cloud could be seen for miles.

There were no injuries reported.

The fire came as emergency crews were also dealing with flash flooding throughout the southern portion of Jefferson County, complicating efforts to quell it.

"We're currently dealing with two significant emergency issues," Louisville Mayor Greg Fischer said at a press conference, adding that another one to two inches of rain was expected this afternoon.

The city has done more than 100 water rescues since 1 a.m. local time, officials said.

GE Appliance Park is a 1,000-acre facility that is headquarters to GE Consumer & Industrial, the appliances division of GE. About 6,000 employees work there.

A GE spokeswoman, Kim Freeman, told NBC News that the affected building was not a production facility and said the rest of the plants have been evacuated.

SOCIAL

#nofilter GE smoke cloud... we should probably all wear gas masks. What chemicals are floating around the city today? pic.twitter.com/OPRVs7IfPe — Brigid Kaelin (@BrigidKaelin) April 3, 2015

— Elizabeth Chuck