Powerful gusts hitting velocities of as high as 155km/h (96mph) have caused around 90,000 homes without power and forced officials to halt over 100 aircraft departures, as reported by domestic outlets.
The gales are affecting the whole South Island and lower areas of the North Island, per the country's meteorological service.
The nation's agencies have released rare severe gust advisories - the top caution category - in key areas such as Wellington and Canterbury.
People have been urged to stay indoors, stay off roads, and get ready for more power and communication outages.
This outage seems to be impacting households mainly in the South Island, while officials report that the electricity supply was being slowly brought back.
Regional news have reported that in certain areas structures have suffered roof damage, and power lines and trees have been toppled by the gales.
Within the capital, a individual was fatally injured after being struck by a tree branch at a popular trail walking spot on Tuesday.
Meanwhile in Wellington, a female was blown onto approaching vehicles on a thoroughfare by a powerful blast, in a event that was captured in a popular vehicle recording.
Flights to and from the urban area have been halted as a result of the weather, while various routes and public facilities are not operating.
Meanwhile authorities in Canterbury have declared a crisis declaration, to facilitate recovery activities.
These intense gusts on this day coincide with tens of thousands of educators, medical professionals and government employees are participating in what has been termed a "significant labor action", requesting improved salaries and workplace environments.
Yet the intense climate has pressured them to alter various scheduled activities, with various open-air gatherings moved indoors or cancelled.
Similar gusts are also sweeping Australia, causing a heatwave to the country's outback.
Agencies have announced burning restrictions for concern about wildfires.
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