Firecrews have been dealing with tonnes of logs on fire in a building on the North Forty Foot Bank, in Brothertoft today (Monday).
The services twitter feed said that crews from Boston, Kirton, Leverton and Donington had been called out at 11am.
A fire and rescue spokesman confirmed the fire, at a commercial building, was caused by embers from a biomass boiler igniting logs.
Operations were later scaled down to two pumping appliances which were damping down.
The blaze caused severe fire damage to about 10 tonnes of logs and part of the roof of the building.
It was extinguished using four breathing apparatus, two hose reel jets and two main jets.