Intense gales hitting speeds of approximately 155km/h (96mph) have resulted in around 90,000 homes experiencing outages and forced officials to cancel over 100 air travel services, according to domestic outlets.
The winds are impacting the whole southern region and southern sections of the northern region, per the country's meteorological service.
Officials in New Zealand have issued uncommon high-level wind alerts - the top caution category - in core zones encompassing Canterbury and Wellington.
People have been encouraged to remain inside, refrain from journeys, and prepare for additional utility disruptions.
Extensive Destruction and Crisis Measures
This outage seems to be impacting homes mainly in the southern region, though authorities say that power was being restored progressively.
Domestic outlets have indicated that in some places homes have lost their roofs, while trees and electricity poles have been brought down by the gusts.
Across Wellington, a man was fatally injured after being struck by a tree branch at a frequent walking route on earlier this week.
Also in the capital, a woman was blown onto approaching vehicles on a thoroughfare by a strong gust of wind, in a moment that was recorded in a widely shared car camera footage.
Air travel in and out of the city have been cancelled as a result of the weather, and certain highways and community centers are also closed.
Simultaneously authorities in Canterbury have declared a state of emergency, to facilitate recovery activities.
Labor Protests Amid Extreme Weather
The powerful gales on Thursday occur while tens of thousands of school staff, physicians and civil servants take part in what has been termed a "major walkout", demanding improved salaries and workplace environments.
Yet the extreme weather has compelled them to change various scheduled activities, with several external protests moved indoors or called off.
Comparable winds are affecting the neighboring country, ushering in a heatwave to the nation's interior regions.
Agencies have announced burning restrictions for apprehension regarding bushfires.