A "building fire" or "structure fire" refers to a fire that involves the structural components of various types of buildings, including residential (such as single-family homes, townhouses, apartments, tower blocks), commercial (offices, shopping malls), or industrial structures. This differs from other types of fires such as "room and contents" fires, chimney fires, vehicle fires, wildfires, or other outdoor fires. Responding to building fires typically involves a designated set of fire department units, including engines, ladder trucks, rescue squads, chief officers, and an EMS unit. The response and assignments can vary among fire departments, with some having a pre-determined plan for specific structures within their jurisdiction. The plan can involve special equipment, such as aerial firefighting vehicles for high-rise buildings or foam-carrying vehicles for structures known to house specific hazardous materials.