The National Disaster Office in Papua New Guinea says about 100,000 people have been affected and may need assistance after heavy rain and floods struck many parts of the country.
Acting Director Martin Mose says his teams are carrying out assessments in Jiwaka, the Western and Southern Highlands and the Central Province.
Mr Mose says he has applied for more than three million US dollars of relief funds from the treasury and hopes to receive the money soon.
He says the amount is the bare minimum needed and more requests may follow as thousands of people have suffered.
"Through loss of food gardens and of course roads have been seriously affected as well. The National Disaster Office is pretty much looking at immediate relief to assist them with due respect to life. Mostly food gardens and of course a few have lost their homes."
There have also been reports of at least half a dozen deaths over the past week but Mr Mose says it has been hard to confirm the loss of life.