Intense gusts hitting velocities of as high as 155km/h (96mph) have caused around 90,000 homes without power and compelled agencies to halt more than 100 flights, based on domestic outlets.
The gales are affecting the complete southern region and southern sections of the northern region, per the weather forecasting body.
The nation's agencies have announced infrequent severe gust advisories - the top caution category - in core zones including Wellington and Canterbury.
People have been encouraged to stay indoors, avoid travel, and get ready for more electricity and network failures.
Extensive Impact and Crisis Response
The electricity loss appears to be affecting households mostly in the South Island, while authorities report that power was being slowly brought back.
Regional news have indicated that in some places structures have suffered roof damage, and trees and electricity poles have been toppled by the winds.
Across Wellington, a individual was lost his life after being hit by a falling limb at a popular trail walking spot on Tuesday.
Meanwhile in Wellington, a woman was blown onto moving cars on a thoroughfare by a intensive burst, in a event that was filmed in a widely shared car camera footage.
Flights to and from the urban area have been halted as a result of the weather, while some roads and libraries are also closed.
Simultaneously local leaders have declared a crisis declaration, to facilitate recovery activities.
Labor Protests Amid Harsh Conditions
The powerful gales on Thursday coincide with tens of thousands of educators, medical professionals and government employees are engaged in what has been called a "significant labor action", calling for higher wages and enhanced employment terms.
Yet the extreme weather has compelled them to change certain arrangements, with several external protests moved indoors or abandoned.
Comparable winds are impacting Australia, ushering in a high-temperature event to the nation's interior regions.
Agencies have announced burning restrictions for fear of bushfires.
