Generally, the issue of crisis management can be related to various emergency situations. Some emergencies are related to natural disasters, such as earthquake, tsunami, volcanic eruption, typhoon, tornado, torrential rain, and heavy snowfall. Other emergencies are related to man-made disasters such as nuclear accident, environmental pollution, fire, and food poisoning. Another type of emergency is related to the administrative crises involving such things as financial failure, corruption, privacy information leak, or social crises involving population outflow and unemployment.