Sri Lanka is governed by an elected executive and a government drawn from a parliament of 200 odd members. It has 9 provinces and there is partial develotion to these levels. In addition, each of the 9 provinces have 2-3 districts in them. Adminstration in each of these districts is under a central authority (formely Government Agent). Each district comprises of perhaps 10-20 subdivisions (called AGA divisions) under the charge of a Divisional secretary. (The population density map shows the AGA boundaries.) Each subdivision has several dozen village units (Grama Niladhari Divisions - GND) comprising a few thousand people.
After a decade-long war and 2 year old cease fire, there is ad-hoc arrangment of control of the Jaffna, Mullaitivu, Killinochchi and Mannar districts by the dominant military group the LTTE and partial control over adjacent areas. There is a formal ceasefire and a monitoring mission from Scandinavian countries. While, the government officials there (GA, Divisional Secretary, GND officers) do liase with the central government, leadership of relief efforts is likely by the LTTE.
Disaster Management has been done by the Department of Social Services until been under the Ministry of Social Services and its focus historically has been on rehabilitation, relief and monitoring. A wider umbrella organization to coordinate disaster management and to bring to gether all resources had been nascent in recent year but has not been activated - this is the National Disaster Management Centre.
There has been active involvement of Non-Governmental Organization in relief during the civil wars and some of them such as Sarvodaya have a exemplary record of service. However, the first responders (and in many areas the only responder in rural areas) are informally organized neighbours, offices, political parties but above all people organized at places of worship.