"This report characterizes the nature of the fire problem in urban areas of the United States. Urbanized areas have large populations, and they typically have higher densities of people and buildings than rural areas. Publications are available that characterize the overall U.S. fire problem and the fire problem in rural areas, but there has not been a recent profile of fire in urban areas. This report addresses that need."
U.S. Fire Administration: http://www.usfa.dhs.gov/