Powerful gales reaching velocities of as high as 155km/h (96mph) have left nearly 90,000 homes without power and compelled officials to cancel over 100 flights, according to local media.
The winds are affecting the complete South Island and lower areas of the northern region, as stated by the weather forecasting body.
New Zealand authorities have announced rare severe gust advisories - the top caution category - in central regions including Canterbury and Wellington.
People have been advised to remain inside, refrain from journeys, and make arrangements for further electricity and network failures.
Extensive Damage and Crisis Response
The power cut is primarily influencing households mainly in the South Island, though agencies report that power was being restored progressively.
Domestic outlets have reported that in certain areas roofs have been ripped off houses, and trees and electricity poles have been brought down by the winds.
In Wellington, a person was lost his life after being struck by a tree branch at a popular trail walking spot on earlier this week.
Meanwhile in Wellington, a woman was swept into moving cars on a thoroughfare by a intensive burst, in a incident that was captured in a viral dashcam video.
Air travel to and from the urban area have been cancelled as a result of the weather, whereas various routes and public facilities are shut down.
Meanwhile Canterbury officials have issued a crisis declaration, to support emergency management operations.
Strike Action Amid Extreme Weather
The powerful gales on this day coincide with many of teachers, doctors and other public workers are engaged in what has been called a "mega strike", requesting better pay and working conditions.
However the extreme weather has compelled them to modify various scheduled activities, with various open-air gatherings moved indoors or called off.
Similar gusts are affecting the nearby nation, ushering in a period of extreme heat to the country's outback.
Officials have announced burning restrictions for concern about bushfires.
