Cyclone Yasa: Two killed in Fiji as Tonga braces for onslaught 18 Dec, 2020 12:01 AM 3 minutes to read Video explaining how a cyclone is formed. Two people have died due to Cyclone Yasa, Fijian officials say, as the category 4 storm heads towards Tonga. Tonga's meteorological service has issued a tropical cyclone warning for the whole of the island nation - with storm-force wind and gale warnings in force for Ha'apai, 'Eua, Vava'u and the main island of Tongatapu. It comes as tropical cyclone Yasa ripped through parts of Fiji, particularly in the north, bringing down trees and flattening homes overnight - forcing locals to higher ground and sheltering in churches and schools.