"Natural hazards such as floods, droughts, tsunamis, tropical cyclones, and earthquakes have the potential for causing massive harm to vital infrastructure. One of the most serious threats that face communities and nations directly after disasters is the disruption of access to safe water. This problem is particularly serious for developing countries, due to their higher levels of vulnerability."
http://www.gdrc.org/uem/disasters/disenvi/index.html
Urban Environmental Management
Disaster Mitigation and Management
http://www.gdrc.org/uem/disasters/