"When the magnitude of death and destruction from an event is severe, many different groups of workers are involved and often work in isolation from each other. Some will undergo the same or similar stresses and emotions; many will have unique stressors and emotions that supervisors are required to understand and manage. Supervision is paramount in maintaining organized and efficient recovery efforts. The following management practices can help minimize difficulties on site and after the event."
Center for the Study of Traumatic Stress: http://www.centerforthestudyoftraumaticstress.org