Severe gusts hitting velocities of up to 155km/h (96mph) have left approximately 90,000 households without power and forced authorities to halt over 100 air travel services, as reported by domestic outlets.
The winds are influencing the whole southern region and southern sections of the northern region, according to the weather forecasting body.
New Zealand authorities have issued uncommon high-level wind alerts - the highest alert level - in core zones such as these major districts.
People have been urged to stay indoors, refrain from journeys, and make arrangements for further power and communication outages.
Widespread Damage and Crisis Measures
The electricity loss appears to be affecting homes mainly in the southern region, although officials say that energy was being restored progressively.
Local media have stated that in some places structures have suffered roof damage, whereas power lines and trees have been toppled by the winds.
In Wellington, a man was fatally injured after being impacted by a wooden fragment at a popular trail walking spot on Tuesday.
Also in the capital, a woman was swept into oncoming traffic on a thoroughfare by a intensive burst, in a incident that was recorded in a viral dashcam video.
Aircraft services to and from the metropolis have been suspended due to the gusts, while certain highways and community centers are shut down.
At the same time Canterbury officials have announced a state of emergency, to facilitate disaster response efforts.
Work Stoppages Alongside Harsh Weather
These intense gusts on today coincide with tens of thousands of educators, medical professionals and government employees are participating in what has been termed a "major walkout", demanding improved salaries and workplace environments.
But the extreme weather has forced them to change some of their plans, with some outdoor rallies shifted to interior venues or cancelled.
Similar gusts are affecting the nearby nation, bringing a heatwave to the nation's interior regions.
Agencies have issued burning restrictions for concern about bushfires.
