The National Emergency Management Office (NEMO) was established under the Emergency Management Act 2007. NEMO’s primary function is to facilitate, coordinate and manage national disaster risk reduction and emergency management activities to ensure the safety and security of Tongan population and its infrastructure. 

Since its establishment, NEMO is coordinating emergency management activities, reviewing and monitoring the National Emergency Management Plan, supporting to National Emergency Management Committees in emergency management as well as implementing the policies and decisions of the National Emergency Management Committee; and establishing effective communication within Government and with non-government organisations and the private sector on emergency management.