An aid campaigner says food shortages in Vanuatu brought about by Cyclone Pam and an ongoing drought could also last to the end of next year.
World Vision's Dominica Leonard was in Tanna Island last month.
She says Tanna is facing a bleak time.
Leonard says initially crops were destroyed by the cyclone while subsequent plantings have been stymied by a lack of water and rock hard ground caused by the drought.
"What they need at the moment is food and water. Medical supplies are also important. There are a lot of clinics that I visited that were noting a large increase in cases of water borne diseases, such as diarrhoea and malnutrition, and some of those stocks are available but some need to be supplied, and so that is where we really need the public support to provide that."
Leonard says on Tanna water tank levels are now very low and so there is little food production.
"I went in the middle of what's known as mango season when there should be mangoes everywhere and there were none at all. The cyclone ripped those out, there were no bananas in the trees, and coconuts are four times the normal price. They were already struggling with food shortages because of Cyclone Pam and now the El Nino sun means that crops aren't growing or they are growing very small."