Ex-situ emergency response is addressed to people that have (temporary) left their homes. The level and type of displacement vary. Settlements generally fall into one of the three categories: highly dispersed (dispersed settlement or host families); mass shelters (e.g. in schools, warehouses or mosques, mostly in urban areas) or in self-settlements (spontaneous camps) or previously planned camps (UNHCR 2007). People living ex-situ after an emergency event have the status of internally displaced persons, IDPs, or that of refugees if they cross international boundaries.