A power failure at the Resolute saw mill in Thunder Bay on Monday resulted in oil from a boiler to catch fire. The fire, about 3:30 p.m., involved the heating system for the lumber drying kilns. As a result of the power outage, the circulating pump for the hot oil from the boiler stopped functioning, which led to the circulating system being over-pressured and the oil catching fire, said Platoon Chief Shawn Merrifield, of the Thunder Bay Fire Rescue service, in a news release on Monday evening. He said the sprinkler system activated and extinguished the flames but the system remained pressurized and overheated. After conferring with onsite staff, a plan was formulated to not interfere with the heating system and to let it cool naturally.