Powerful winds reaching speeds of as high as 155km/h (96mph) have caused around 90,000 properties lacking electricity and led authorities to halt more than 100 air travel services, based on local media.
The winds are influencing the whole South Island and southern sections of the northern region, per the weather forecasting body.
The nation's agencies have announced uncommon red wind warnings - the most severe warning - in key areas including Canterbury and Wellington.
People have been urged to avoid going outside, refrain from journeys, and prepare for additional utility disruptions.
The power cut seems to be impacting residences mostly in the South Island, while authorities say that the electricity supply was being gradually reinstated.
Domestic outlets have indicated that in some places structures have suffered roof damage, while trees and electricity poles have been brought down by the winds.
Across Wellington, a person was fatally injured after being struck by a tree branch at a frequent walking route on Tuesday.
Additionally in the city, a woman was pushed toward approaching vehicles on a street by a strong gust of wind, in a moment that was filmed in a viral dashcam video.
Air travel entering and leaving the urban area have been suspended due to the gusts, while certain highways and community centers are not operating.
Meanwhile authorities in Canterbury have issued a emergency situation, to facilitate emergency management operations.
These intense gusts on today coincide with many of teachers, doctors and other public workers take part in what has been described as a "mega strike", demanding higher wages and enhanced employment terms.
However the intense climate has forced them to change various scheduled activities, with various open-air gatherings moved indoors or called off.
Comparable winds are also sweeping the neighboring country, ushering in a heatwave to the country's outback.
Officials have declared fire bans for concern about wildfires.
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