Communication went down in Tonga around 7pm on Saturday night, if there have been any casualties or the full extent of the damage is unknown.
Clean-up work is already well underway Civil Defence Northland says.
Civil Defence says the advisory is for parts of the North Island, the Chatham Islands and now the West Coast of the South Island.
The Serbian star is due to formally appeal the second, and hopefully final, attempt by the Australian Government to cancel his visa.
Officials say epidemiological work is underway to establish the origin of the infection.
A strong wind watch is still in place for the eastern Bay of Plenty and northern Gisborne.
The Ministry of Foreign Affairs and Trade said 30 Kiwis are currently registered on SafeTravel as being in Tonga.
People were sent scrambling from the beach by the massive boom.
Twenty-two people are in hospital with the virus.
The woman just finished choir practice at the church in the low lying village of Patangata when the tsunami hit.
The case has seven household contacts and 48 further close contacts.
Sue McIntyre, 55, requested a formal exemption from the Ministry of Health late last year on the advice of her GP.
It comes little more than a week after the mayor and governor announced plans to boost subway policing and outreach to homeless people in New York City's streets and trains.
The PM will be joined by Peeni Henare and Aupito William Sio.
Tsunami activity from Tonga left many boats underwater at Tūtūkākā Marina.
An Auckland MIQ worker was active in the community before testing positive for the Covid variant.
It's understood one person was trapped in a vehicle.
Police received a report of a person in possession of a firearm on a Masterton intersection.
It comes as the main undersea communications cable has been impacted, likely due to the loss of power caused by Saturday's volcanic eruption.
Coverage of the ongoing situation in Tonga and across the Pacific after a large eruption of Hunga-Tonga-Hunga-Ha'apai on Saturday, causing tsunami waves, as it happened.
Novak Djokovic released a statement on Sunday night, just minutes after an Australian court ordered he be deported from the country.
