New Zealand coastal areas on the north and east coast of the North Island and the Chatham Islands are expected to experience “strong and unusual currents and unpredictable surges at the shore” following a large volcanic eruption in Tonga, said a statement of the agency.
This is the largest eruption from the Tongan volcano so far, and the eruption is ongoing, it said.
“Strong currents and surges can injure and drown people. There is a danger to swimmers, surfers, people fishing, small boats and anyone in or near the water close to shore,” it added.
People in or near the sea are advised to move out of the water, off beaches and shore areas and away from harbors, rivers and estuaries until at least early Sunday morning.