Tonga is being hit by Cyclone Zazu this afternoon, with winds gusting up to 120 kilometre an hour.
Photo: Fiji Met Service
The category one storm is passing by the islands of Vava'u bringing destructive storm force winds, thunderstorms and high seas.
Cyclone Zazu is moving south-southeast and is expected to lie around 60 kilometres south of Neiafu, Vava'u at 3pm this afternoon
The storm is expected to strengthen into a category two system as it moves away from Tonga.
Meanwhile a second cyclone, Yasa, continued to intensify as it sat in the warm waters between Vanuatu and Fiji .
The category three storm, packing winds of up to 150 km/hr, was now forecast to develop into a category five storm, the strongest level, as it tracks over Fiji at the end of the week.
Fiji was hit by severe tropical Cyclone Harold in April, a storm which killed one person, injured many others and caused over $US10 million worth of damage.
Forecast track for Severe Tropical Cyclone Yasa Photo: Fiji Met Service