A structure fire is a fire in any of various resiential or commercial buildings, such as single-family homes, townhouses, apartments, high-rises, and shopping malls. This is in contrast to automobile fires, wildfires or other outside fires. Structure fires typically have a similar response from the fire department to include engines, ladder trucks, rescue squads, battalion chiefs, and an EMS unit, each of which will have specific initial assignments. The actual response and assignments will vary between fire departments.