The United States relies on a number of infrastructure systems — roads, the electric grid, ports, telecommunications networks, refineries, and the like — for carrying out basic social and economic functions. Disruptions of these systems could impose potentially significant economic, social, environmental and national security consequences.
Anu Narayanan,Henry H. Willis,Jordan R. Fischbach,et al. Characterizing National Exposures to Infrastructure from Natural Disasters: Data and Methods Documentation. 2016-01-01.