It's that time of year when the leaves turn and that burned dust smell from freshly fired furnaces — and with it comes a rise in chimney fires. Chimney fires can burn explosively. The first indication of a chimney fire is usually the noise — a roaring sound that grows louder as the fire intensifies, reaching temperatures of up to 2,000 F. Ensure the occupancy is fully evacuated. And because all fires are unpredictable, firefighters must wear full PPE, including SCBA.