The head of Oxfam says the destruction caused by Cyclone Pam in Vanuatu is "likely to be one of the worst disasters ever seen in the Pacific".
The organisation has sent a 10 person team to the archipelago, with a population of 250,000, which was hit by the cyclone early on the morning of Saturday March 14.
Executive director of Oxfam Rachel Le Mesurier said the cyclone was "worse than the worst case scenario" and one of the biggest disasters the Pacific had seen.
The capital Port Vila, on the main island of Efate, has been left with 90 per cent of housing and major infrastructure damaged - including the hospital, the morgue and schools.
However, Le Mesurier said Oxfam was increasingly concerned for those people on the isolated outer islands, where communication was still down, who had had little protection from the 250kmh winds.