Papua New Guinea's Central Province disaster coordinator, Sidney Tau, says his agency is distributing food and temporary shelter to hundreds of the people affected by the flooding over the past week.
About 11 000 people in five villages have been affected and hundreds have been made homeless.
Many houses have been damaged and a lot of food gardens have been destroyed.
Disaster officials are assessing what needs to be done and Mr Tau says they have already provided some materials for shelter.
"The government has seen fit to provide them with temporary building materials to assist the locals to put up their temporary homes at this point in time."