Fiji's Metservice says the weather system currently battering the country is a once-in-fifty-years event.
A severe flooding warning has been issued for the whole country, predicting winds with average speeds up to 55 kilometres per hour, with periods of heavy rain and squally thunderstorms.
The Metservice director, Rajendra Prasad, says it is only a matter of time before the whole groups is under cloud cover.
"Almost every place on the larger island has equal chance of getting flooded. Certainly there's expected to be severe flooding in the Western Division and the Northern Division as well in this particular place, the northern part of Vanua Levu where that has already been heavy rainfall over the past 24 hours. That is expected to continue receiving rain until Saturday, and perhaps even beyond."