A finishing company in Michigan experienced this when they suffered from a large dust fire in the powder coating area of their building. The fire appears to have initially come from the powder collector, but then spread into the ceiling, spreading thick black smoke throughout the building, causing the roof to partially collapse.
Employees who first noticed the smoke grabbed fire extinguishers and tried to put it out on their own, but the flames grew too big too fast, and the fire department was called while the employees left the building safely.
Firefighters on the scene used an aerial truck and hoses at the back of the building to keep the flames under control, while others worked from the inside trying to get past cinder block walls and the debris from the collapsed roof. A Haz-Mat team was also requested on site to deal with the smoke and dust from the fire. Eventually an excavator was brought to the scene to remove equipment from the roof and knock down the walls on the side of the building with the fire.
