Powerful gusts attaining speeds of as high as 155km/h (96mph) have caused nearly 90,000 households lacking electricity and compelled agencies to cancel in excess of 100 air travel services, based on local media.
The gales are affecting the entire southern region and southern sections of the North Island, according to the weather forecasting body.
Officials in New Zealand have issued rare red wind warnings - the highest alert level - in core zones including Wellington and Canterbury.
Locals have been urged to remain inside, avoid travel, and get ready for more power and communication outages.
This outage is primarily influencing households predominantly in the South Island, while authorities say that the electricity supply was being gradually reinstated.
Local media have stated that in some places homes have lost their roofs, and utility poles and vegetation have been brought down by the gales.
Within the capital, a individual was lost his life after being impacted by a wooden fragment at a frequent walking route on Tuesday.
Also in the capital, a woman was pushed toward approaching vehicles on a street by a intensive burst, in a incident that was filmed in a viral dashcam video.
Flights in and out of the metropolis have been halted because of the weather, while various routes and public facilities are shut down.
Simultaneously Canterbury officials have issued a state of emergency, to assist recovery activities.
The powerful gales on Thursday come as tens of thousands of school staff, physicians and civil servants take part in what has been termed a "mega strike", demanding better pay and working conditions.
But the severe conditions has pressured them to change certain arrangements, with various open-air gatherings moved indoors or cancelled.
Similar gusts are impacting Australia, bringing a period of extreme heat to the nation's interior regions.
Authorities have declared burning restrictions for concern about wildfires.
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