Fiji's interim leader Frank Bainimarama has addressed the nation ahead of the arrival of cyclone Evan.
Evacuations have begun in some areas and Commodore Bainimarama has warned that none of the island nation will be spared.
The cyclone is due to hit on Sunday, when it is expected to intensify into a category four or five storm.
It is expected to bring gusts of over 180 km/h and flooding to low-lying areas.
Earlier, Samoa was battered, with three people killed, including two children.
Many buildings have been damaged, and there are fears for a number of people missing in widespread flooding.
The Samoan governmnet has declared a state of disaster in the region.
It's one of the most powerful cyclones to hit Samoa in 20 years.