The United Nations Office for the Coordination of Humanitarian Affairs (OCHA) is a United Nations (UN) body formed in December 1991 by General Assembly Resolution 46/182. The resolution was designed to strengthen the UN's response to complex emergencies and natural disasters.
Earlier UN organizations with similar tasks were the Department of Humanitarian Affairs (DHA), and its predecessor, the Office of the United Nations Disaster Relief Coordinator (UNDRO). In 1998, due to reorganization, DHA merged into OCHA and was designed to be the UN focal point on major disasters. It is a sitting observer of the United Nations Development Group.