Intense gusts reaching velocities of as high as 155km/h (96mph) have left around 90,000 properties without power and led agencies to call off over 100 air travel services, according to local media.
The gales are impacting the whole South Island and southern sections of the northern region, per the country's meteorological service.
Officials in New Zealand have announced rare red wind warnings - the top caution category - in core zones such as Canterbury and Wellington.
People have been urged to remain inside, avoid travel, and make arrangements for further electricity and network failures.
Extensive Destruction and Crisis Response
The power cut appears to be affecting homes mainly in the South Island, though authorities report that power was being gradually reinstated.
Local media have stated that in some places structures have suffered roof damage, whereas trees and electricity poles have been brought down by the winds.
Within the capital, a man was killed after being impacted by a falling limb at a popular trail walking spot on Tuesday.
Meanwhile in Wellington, a woman was pushed toward approaching vehicles on a road by a intensive burst, in a moment that was filmed in a viral dashcam video.
Air travel to and from the metropolis have been halted as a result of the winds, while some roads and libraries are also closed.
Simultaneously Canterbury officials have announced a state of emergency, to support emergency management operations.
Labor Protests During Severe Weather
These intense gusts on Thursday come as numerous of teachers, doctors and other public workers are participating in what has been described as a "significant labor action", calling for higher wages and enhanced employment terms.
Yet the severe conditions has pressured them to modify various scheduled activities, with various open-air gatherings relocated inside or cancelled.
Comparable winds are also sweeping the nearby nation, causing a period of extreme heat to the nation's interior regions.
Authorities have issued flame prohibitions for fear of bushfires.
