A fire inside a tank of liquid asphalt at a facility in Madison, North Carolina, on Tuesday prompted officials to evacuate residents from the nearby area as firefighters determine how to extinguish the flames.

The fire broke out inside a 17,000-gallon tank that was filled with about 11,500 gallons of liquid asphalt at SealMaster on West Decatur Street, the Madison Fire Department told reporters.

"We have an evacuation zone right now of 1,000 feet in all directions and everybody within a half a mile is sheltering in place," Madison Fire Chief Jim Ritchey said.

Ritchey said that firefighters tried using Purple K, a dry chemical substance, to put out the fire but it did not work. He said that firefighters don’t want to add water or air into the tank at this time.

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Sealmaster exteriors in Madison, North Carolina

SealMaster is a facility in Madison, North Carolina, where a tank of liquid asphalt caught on fire on Tuesday. (Google Street View, File)

Power has been cut to the tank to cool the liquid asphalt so that the product hardens, and officials are monitoring a nearby tank.

The chief said the fire was "semi-stable" but officials are trying to figure out why it is increasing in temperature. 

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Officials are also trying to determine if there is a possibility for an explosion, according to Ritchey, and firefighters were pulled back from the potential "blast zone."

Firefighter wearing a rolled fire hose

Fire officials said that Purple K was used to extinguish the fire but that the chemical substance did not work. Firefighters decided against putting water or air into the tank at this time. (iStock)

Officials were in contact with the producers of the asphalt, who are based in Canada, to determine the best method to put out the fire.

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Air monitoring is also in place for a half-mile area, officials said.