The Catholic bishop of Wallis and Futuna, says a French warship, due on Wednesday in the territory is expected to bring some emergency food.
The vessel's main task will be to transport hundreds of people stranded by two weeks of rain.
The flooding in the past weeks have caused extensive damage to infrastructure, including shutting down the only airstrip in Futuna.
The bishop says the situation is not too worrying, but many food gardens and plantations have been destroyed by the flood.
"Another ship wanted to come, but they could not get to the harbour because the sea was too rough for two or three weeks. So I think the ship from Noumea will bring some food too."