Intense gales attaining velocities of as high as 155km/h (96mph) have caused nearly 90,000 households without power and forced agencies to cancel over 100 aircraft departures, based on regional news sources.
These gusts are influencing the complete South Island and southern sections of the North Island, as stated by the national weather agency.
The nation's agencies have issued infrequent red wind warnings - the most severe warning - in key areas encompassing these major districts.
Residents have been urged to remain inside, stay off roads, and make arrangements for more utility disruptions.
The power cut appears to be affecting homes mainly in the southern region, although authorities state that power was being slowly brought back.
Local media have indicated that in some places homes have lost their roofs, and utility poles and vegetation have been knocked down by the gales.
In Wellington, a person was lost his life after being struck by a wooden fragment at a well-known hiking path on Tuesday.
Additionally in the city, a female was blown onto moving cars on a street by a strong gust of wind, in a moment that was recorded in a widely shared car camera footage.
Aircraft services to and from the city have been cancelled due to the winds, while some roads and libraries are also closed.
Meanwhile authorities in Canterbury have announced a crisis declaration, to support disaster response efforts.
These intense gusts on Thursday come as many of teachers, doctors and other public workers take part in what has been termed a "significant labor action", calling for better pay and working conditions.
But the extreme weather has forced them to alter certain arrangements, with several external protests moved indoors or called off.
Similar gusts are also sweeping the neighboring country, causing a high-temperature event to the nation's interior regions.
Officials have declared fire bans for concern about bushfires.
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