The United Nations Office for the Coordination of Humanitarian Affairs said limited availability of key agriculture items such as seeds and cuttings in-country is constraining efforts to avoid food insecurity.
UNOCHA states Quarantine or bio-security is an added complication for the importation of these items.
It states funding gaps mean some sectors, particularly Shelter and Food Security, will not be able to meet identified humanitarian needs, especially in areas affected by both Cyclone Winston and the subsequent flooding.
UNOCHA said the complex logistics and expense of responding to needs across dozens of severely affected outer islands is challenging some sectors.
This will become more severe now that foreign military assets have left the country and are no longer available for humanitarian work.
Assessments that are now underway will assist but improved data will result in a more effectively targeted response.