Thunder Bay Fire was kept busy last night with a massive fire that gutted an older two storey home on Brock Street. Platoon Chief Dave Nelson says it was hard to supress the fire and the house is now considered a right off. Two firefighters were trapped when fire broke through the main floor burning their fire hose and leaving the two stranded in heavy smoke. They were able to escape through a kitchen window. The cause of the fire is believed to be electrical heaters being used to heat the home.