www.gsdma.org ICT in DM disaster management 26 egov / www.egovonline.net / January 2012 Very large natural disasters are Black Swan events that happen probably once every few years. The emergency response centre should be flexible enough to normally run with a complement of 10-15 people but in case of an emergency, it must have the ability to ratchet up the manning to 90-100 people within min- utes so that it can transition to operating under a state of emergency almost immediately.