Fijian PM Frank Bainimarama has told everyone to stay indoors unless they are emergency personnel.
Prime Minister Jacinda Ardern said there is also an aircraft ready to deploy with essential supplies if it is needed.
1 NEWS Pacific correspondent Barbara Dreaver says Cyclone Harold still 'packs 'an almighty punch' despite dropping to category four.
Associate Health Minister Jenny Salesa says "our Pacific communities face unique challenges that require a targeted response".
The team trains together for four hours each day, and players in competitive leagues have a chance a netting hundreds of thousands of dollars per year in prize money.
A second person aged 70 who had been in contact with two confirmed cases in the Northern Marianas has also died.