A volunteer in Vanuatu says the delivery of food to the wrong area of Ambrym Island is bad news for the children on the southeastern side.
Richard Henderson said the area was a two-day walk from the supply drop-off in the west, and the children have been on quarter rations since Cyclone Pam hit 10 days ago.
He said food supplies were dangerously low.
"The adults have a bit of a fat store, and they can handle a couple of days without food, even though everyone has been on quarter rations, from what I heard, for at least the last week.
"The key thing there is with children not getting food, this is going to create disease, and we're going to create a bigger disaster."
Mr Henderson said they were hurrying to find boats that could transfer the food to the southeast, but it was frustrating trying to communicate local knowledge to the central authorities.