Severe gusts hitting speeds of up to 155km/h (96mph) have left approximately 90,000 homes experiencing outages and compelled authorities to call off over 100 flights, based on domestic outlets.
The winds are influencing the whole South Island and southern sections of the North Island, according to the weather forecasting body.
Officials in New Zealand have issued rare severe gust advisories - the most severe warning - in core zones including Canterbury and Wellington.
Residents have been encouraged to remain inside, refrain from journeys, and make arrangements for additional electricity and network failures.
Widespread Destruction and Emergency Response
This outage is primarily influencing residences mostly in the southern region, while agencies state that the electricity supply was being gradually reinstated.
Domestic outlets have stated that in some places structures have suffered roof damage, and utility poles and vegetation have been toppled by the gales.
Across Wellington, a man was killed after being struck by a tree branch at a frequent walking route on Tuesday.
Additionally in the city, a woman was pushed toward moving cars on a thoroughfare by a strong gust of wind, in a event that was filmed in a popular vehicle recording.
Flights to and from the metropolis have been halted due to the winds, while certain highways and community centers are shut down.
At the same time local leaders have issued a crisis declaration, to facilitate disaster response efforts.
Strike Action During Harsh Weather
The wild winds on Thursday coincide with tens of thousands of teachers, doctors and other public workers take part in what has been termed a "major walkout", calling for higher wages and enhanced employment terms.
However the extreme weather has forced them to alter some of their plans, with several external protests relocated inside or called off.
Comparable winds are also sweeping the nearby nation, ushering in a high-temperature event to the nation's interior regions.
Agencies have announced fire bans for fear of bushfires.
