A cyclone has formed between Vanuatu and Fiji.
Tropical Cyclone Yasa is a Category 1 storm, which is expected to strengthen to a Category 3 within the next two days.
The system is moving in a south-westerly direction before it is expected to turn towards the northwest and by Thursday to be back to today's position.
At this stage, there is no forecast of where the system might be making a landfall.
However Fiji authorities are advising people to keep abreast of the situation via the Fiji Met Service updates or radio.
According to the local National Disaster Management Office, the system will bring associated rain that may lead to flooding of low-lying areas.
The NDMO said landslide and landslips are also to be expected and members of the public are to contact police or the National Fire Authority immediately.
Meanwhile, a tropical low north of Tonga's Vava'u islands is forecast to intensify and turn into a cyclone by tonight.
The system is then forecast to move in a south-easterly direction and be well clear of Tonga by Wednesday.