Severe winds hitting velocities of up to 155km/h (96mph) have caused nearly 90,000 properties lacking electricity and led agencies to cancel more than 100 air travel services, based on local media.
These gusts are impacting the entire South Island and southern parts of the North Island, as stated by the national weather agency.
The nation's agencies have issued rare severe gust advisories - the highest alert level - in central regions such as Canterbury and Wellington.
Residents have been encouraged to stay indoors, refrain from journeys, and get ready for additional electricity and network failures.
Broad Damage and Crisis Response
The power cut is primarily influencing homes mainly in the South Island, while agencies report that power was being restored progressively.
Local media have reported that in various locations homes have lost their roofs, and power lines and trees have been toppled by the gales.
Across Wellington, a individual was lost his life after being hit by a wooden fragment at a popular trail walking spot on earlier this week.
Also in the capital, a woman was swept into oncoming traffic on a road by a intensive burst, in a incident that was captured in a popular vehicle recording.
Air travel to and from the city have been halted due to the weather, whereas various routes and public facilities are not operating.
Simultaneously authorities in Canterbury have announced a crisis declaration, to facilitate emergency management operations.
Strike Action Alongside Extreme Conditions
These intense gusts on this day occur while numerous of teachers, doctors and other public workers take part in what has been called a "major walkout", calling for better pay and working conditions.
Yet the intense climate has compelled them to alter certain arrangements, with several external protests relocated inside or cancelled.
Similar gusts are also sweeping Australia, ushering in a high-temperature event to the nation's interior regions.
Officials have issued fire bans for fear of bushfires.