Lifelines are vital to the health and safety of the community and the functioning of an urban and industrialized society. Lifelines are critical for the emergency response and recovery of a community after a disaster. Lifelines include electric power, communications, transportation (highways, airports, railroads and harbors), water, sewage, natural gas, and liquid fuel systems. A discussion of hospital lifelines is included here. See also the chapters on nonstructural components and highways.
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