Severe winds attaining velocities of up to 155km/h (96mph) have resulted in around 90,000 homes lacking electricity and forced authorities to halt more than 100 air travel services, based on domestic outlets.
These gusts are impacting the whole South Island and southern sections of the northern region, per the country's meteorological service.
The nation's agencies have announced rare severe gust advisories - the highest alert level - in core zones encompassing Canterbury and Wellington.
Locals have been advised to stay indoors, avoid travel, and make arrangements for more power and communication outages.
Widespread Damage and Emergency Response
The power cut seems to be impacting residences mainly in the southern region, although officials state that the electricity supply was being restored progressively.
Regional news have stated that in various locations structures have suffered roof damage, while power lines and trees have been toppled by the gales.
In Wellington, a person was fatally injured after being impacted by a wooden fragment at a well-known hiking path on Tuesday.
Meanwhile in Wellington, a female was pushed toward approaching vehicles on a road by a powerful blast, in a event that was captured in a popular vehicle recording.
Air travel in and out of the urban area have been cancelled as a result of the winds, and various routes and public facilities are shut down.
Meanwhile authorities in Canterbury have declared a crisis declaration, to facilitate recovery activities.
Strike Action During Harsh Conditions
The wild winds on Thursday come as tens of thousands of teachers, doctors and other public workers are engaged in what has been called a "mega strike", requesting better pay and working conditions.
Yet the severe conditions has forced them to alter some of their plans, with some outdoor rallies relocated inside or called off.
Similar gusts are affecting Australia, causing a period of extreme heat to the remote areas.
Officials have issued burning restrictions for concern about forest fires.