Management Classication in Normal, Emergency and Critical Conditions: Root Cause Analysis of Flood Crisis in Tehran Subway

The nature is full of phenomena that when exceed the balance condition, change to hazards which threatens humans and properties, creating risk followed by critical conditions. Gradual formation process of hazards in nature and society leaves no room for skipping hazard and risk analysis. Lack of attention to these gradual changes with sudden occurrence, leads to fast changes from emergency condition to critical condition due to prompt occurrence of the events known as unpredicted accidents. In this paper, three conditions of normal, emergency and critical and their relevant managements are classified, using modified balance theory in disaster management. Flood in Tehran and the water flow in Tehran subway tunnels, was discussed using the management classification. The root cause of quick changes of emergency condition of water channel damage to the critical condition of water flow in subway tunnels was due to unsuitable risk management during normal conditions. The weakness of risk management and emergency management were replaced by the strengths and experiences of crisis management from this event. Lack of attention to the gradual changes of conditions from normal to critical, and unsuitable enhancement of the relevant managements of these three conditions, leads to similar crisis.