Severe gusts attaining speeds of up to 155km/h (96mph) have caused approximately 90,000 properties without power and led officials to halt more than 100 air travel services, according to local media.
The gales are affecting the whole South Island and lower areas of the North Island, according to the national weather agency.
Officials in New Zealand have announced rare high-level wind alerts - the most severe warning - in key areas including these major districts.
People have been advised to avoid going outside, stay off roads, and get ready for additional electricity and network failures.
Widespread Damage and Crisis Response
The electricity loss is primarily influencing households mostly in the South Island, though agencies report that power was being gradually reinstated.
Local media have indicated that in various locations structures have suffered roof damage, and trees and electricity poles have been brought down by the gales.
Across Wellington, a individual was lost his life after being hit by a tree branch at a frequent walking route on earlier this week.
Also in the capital, a individual was pushed toward moving cars on a thoroughfare by a intensive burst, in a moment that was filmed in a widely shared car camera footage.
Flights to and from the city have been suspended due to the gusts, while some roads and libraries are also closed.
Meanwhile local leaders have announced a state of emergency, to facilitate disaster response efforts.
Strike Action Amid Harsh Weather
These intense gusts on this day come as tens of thousands of educators, medical professionals and government employees take part in what has been termed a "major walkout", requesting improved salaries and workplace environments.
Yet the intense climate has pressured them to change some of their plans, with various open-air gatherings relocated inside or cancelled.
Comparable winds are also sweeping the nearby nation, causing a heatwave to the country's outback.
Authorities have declared flame prohibitions for apprehension regarding forest fires.
