Intense gusts attaining velocities of as high as 155km/h (96mph) have caused around 90,000 homes without power and compelled agencies to call off in excess of 100 air travel services, as reported by domestic outlets.
The winds are influencing the whole southern region and southern parts of the northern region, according to the national weather agency.
The nation's agencies have issued rare high-level wind alerts - the highest alert level - in core zones including these major districts.
People have been advised to avoid going outside, stay off roads, and make arrangements for further utility disruptions.
Widespread Impact and Crisis Response
The power cut is primarily influencing homes predominantly in the South Island, though agencies say that power was being slowly brought back.
Domestic outlets have reported that in certain areas structures have suffered roof damage, and utility poles and vegetation have been knocked down by the gusts.
Across Wellington, a person was killed after being impacted by a tree branch at a frequent walking route on Tuesday.
Meanwhile in Wellington, a female was blown onto approaching vehicles on a road by a powerful blast, in a event that was filmed in a popular vehicle recording.
Air travel in and out of the city have been suspended because of the weather, and certain highways and community centers are shut down.
Simultaneously authorities in Canterbury have declared a emergency situation, to assist disaster response efforts.
Strike Action Amid Extreme Conditions
The wild winds on Thursday coincide with many of teachers, doctors and other public workers are participating in what has been called a "significant labor action", calling for improved salaries and workplace environments.
However the intense climate has pressured them to change various scheduled activities, with some outdoor rallies shifted to interior venues or cancelled.
Comparable winds are impacting the neighboring country, bringing a heatwave to the nation's interior regions.
Officials have declared fire bans for apprehension regarding forest fires.
