Severe gales attaining speeds of as high as 155km/h (96mph) have caused around 90,000 properties lacking electricity and compelled authorities to halt more than 100 air travel services, according to regional news sources.
The winds are impacting the whole South Island and southern parts of the North Island, according to the national weather agency.
The nation's agencies have released infrequent severe gust advisories - the top caution category - in key areas such as Canterbury and Wellington.
People have been urged to stay indoors, refrain from journeys, and make arrangements for more electricity and network failures.
Extensive Destruction and Emergency Measures
The power cut is primarily influencing households mostly in the South Island, while officials say that energy was being restored progressively.
Local media have indicated that in certain areas structures have suffered roof damage, while power lines and trees have been knocked down by the winds.
Across Wellington, a man was fatally injured after being impacted by a wooden fragment at a well-known hiking path on earlier this week.
Additionally in the city, a woman was pushed toward oncoming traffic on a thoroughfare by a strong gust of wind, in a moment that was captured in a popular vehicle recording.
Air travel in and out of the city have been halted as a result of the winds, while certain highways and community centers are also closed.
Simultaneously authorities in Canterbury have announced a emergency situation, to support recovery activities.
Labor Protests Amid Severe Weather
These intense gusts on Thursday come as many of teachers, doctors and other public workers are engaged in what has been called a "mega strike", demanding better pay and working conditions.
Yet the severe conditions has compelled them to change various scheduled activities, with various open-air gatherings moved indoors or abandoned.
Similar gusts are affecting the neighboring country, ushering in a heatwave to the nation's interior regions.
Authorities have announced burning restrictions for fear of forest fires.
