A heavy rain alert is now in force for the whole of Fiji group.
The national weather forecasting centre in Nadi says an active trough of low pressure is expected to develop to the west of Fiji and gradually move east over the Fiji group.
It is forecast to affect most parts of the group from later Wednesday until early Friday.
The weatherman forecasts occasional to periods of rain, heavy at times, and thunderstorms to be expected from Wednesday evening.
Localised heavy falls may lead to flash flooding in low-lying and flood-prone areas, and also chances of river flooding.
Afternoon or evening thunderstorms, with isolated heavy falls and possible flash flooding are expected to continue, especially over the Central Division, Nadroga-Navosa province, interior of Ba, southern Bua and Cakaudrove provinces.
