Powerful winds hitting speeds of up to 155km/h (96mph) have resulted in around 90,000 properties without power and forced authorities to call off over 100 air travel services, as reported by local media.
The gales are impacting the whole South Island and southern sections of the North Island, as stated by the weather forecasting body.
The nation's agencies have announced rare severe gust advisories - the highest alert level - in core zones encompassing Canterbury and Wellington.
People have been urged to remain inside, refrain from journeys, and prepare for more utility disruptions.
Extensive Damage and Emergency Measures
The electricity loss is primarily influencing homes predominantly in the southern region, although officials say that energy was being gradually reinstated.
Local media have indicated that in some places roofs have been ripped off houses, whereas trees and electricity poles have been toppled by the gales.
Within the capital, a person was killed after being impacted by a wooden fragment at a frequent walking route on earlier this week.
Meanwhile in Wellington, a individual was pushed toward approaching vehicles on a thoroughfare by a strong gust of wind, in a moment that was recorded in a widely shared car camera footage.
Flights in and out of the city have been cancelled because of the weather, whereas certain highways and community centers are shut down.
Simultaneously local leaders have declared a emergency situation, to facilitate emergency management operations.
Strike Action During Harsh Weather
The wild winds on today coincide with numerous of teachers, doctors and other public workers are engaged in what has been termed a "major walkout", requesting improved salaries and workplace environments.
However the intense climate has pressured them to alter some of their plans, with some outdoor rallies moved indoors or cancelled.
Like conditions are impacting Australia, bringing a period of extreme heat to the nation's interior regions.
Agencies have declared flame prohibitions for fear of forest fires.