Fiji's Metservice has issued a severe flooding warning for the whole country, just days after the Western Division suffered devastating floods.
Forecasters are 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 by midnight tonight, the whole group will be under cloud cover, with a risk of severe flooding in low-lying areas, in almost every part of the country.
He says it is a once-in-50-years event.
"It's really hard to actually compare to what happened last week, I would say rainfall amounts would be very similar and in this case because of the ground conditions already being saturated river levels running high, a lot of water clogged areas and the drainage system becoming very poor."
Rajendra Prasad says the rain over Viti Levu should continue for most of the week, and into the weekend for Vanua Levu.