Bougainville's disaster coordinator says the autonomous Papua New Guinea region has been stretched to the limit as it deals with several natural disasters.
Franklin Lacey says around 5,000 people in the atolls region are in need of food and water after large swells washed across the islands, destroying food gardens and water supplies.
He says combined with landslides and flooding in the Panguna and Torokina districts, the region's disaster resources are running out.
Mr Lacey says most of the 158,000 US dollars allocated by the national government has been exhausted, and with a severe El Niño predicted for the rest of the year, more is needed.
"So that 500 thousand (kina), most of it has gone to the atolls and we don't have that funding now. I was in Port Moresby a while back to look for additional funding from the National Disaster Centre and they promised to give me some funding, but I haven't received that funding as yet."