If you smell burnt sweet potatoes around the town of Farmville it has nothing to do with holiday baking.

A silo full of dehydrated sweet potatoes has been smoldering in the North Carolina town since at least the week of Thanksgiving, said Farmville town manager David Hodgkins.

Firefighters and other town personnel have been at the scene around the clock since November 27, when Hodgkins said the fire was reported.

At least 25 million gallons of water have been sprayed, but the fire still burns.

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A constant streams of water continues to be applied to a silo fire in Farmville, North Carolina this week

The silo full of dehydrated sweet potatoes has been smoldering in the town an hour east of Raleigh since at least the week of Thanksgiving, said Farmville town manager David Hodgkins

Hodgkins says the fire doesn't pose a health threat to the town of nearly 5,000 people, an hour east of Raleigh, but some residents are complaining about the smoke.

The silos belong to Natural Blend Vegetable Dehydration, which opened last year.

It dehydrates sweet potatoes to use primarily in pet food, according to a release from the NCEast Alliance.

The company, which employs around 30 people, is expected to be forced to pay the firefighting costs. This includes buying water from nearby Greenville.

It's not clear when or how the fire started. Some dehydrated sweet potatoes in the silo got wet over the summer before drying and solidifying, and the company tried drilling holes to dislodge the hardened mass — which may have created a spark, Hodgkins said.

Firefighters initially used a machine to continuously spray water from the side, but they've switched to periodic 10,000-gallon sprays into the top of the silo

'It's been described as harder than concrete,' he said.

North Carolina produces more sweet potatoes than any other state.

Bobby Ham, a manager listed in state filings, didn't immediately return a message seeking comment.

Firefighters initially used a machine to continuously spray water from the side, but they've switched to periodic 10,000-gallon sprays into the top of the silo, he said. Farmville sought advice from experts on fighting oil well fires, and state forestry officials used a helicopter to take infrared images.