A heavy rain alert is now in force for Yasawa and Mamanuca group, eastern half of Viti Levu, western Vanua Levu, Lau and Lomaiviti group.

The Fiji Met Office says a trough of low pressure remains slow moving over Fiji.

Meanwhile, another trough of low pressure is expected to drift from the northwest later today bringing associated cloud and rain which is expected to affect most parts of the country until Friday.

The Fiji Met Office says for the areas mentioned above occasional rain, heavy at times and few thunderstorms, rain becoming more frequent and heavy from later tonight can be expected.

Important to remember that localised heavy falls may lead to flash flooding of low lying areas.