Intense gusts hitting velocities of as high as 155km/h (96mph) have left nearly 90,000 properties experiencing outages and compelled authorities to call off more than 100 flights, according to domestic outlets.
The gales are affecting the entire southern region and lower areas of the northern region, per the weather forecasting body.
Officials in New Zealand have announced infrequent red wind warnings - the highest alert level - in core zones encompassing Canterbury and Wellington.
Locals have been urged to stay indoors, refrain from journeys, and prepare for further utility disruptions.
Broad Damage and Emergency Measures
The power cut is primarily influencing homes predominantly in the southern region, although agencies state that energy was being slowly brought back.
Local media have stated that in various locations structures have suffered roof damage, whereas trees and electricity poles have been knocked down by the gales.
In Wellington, a man was fatally injured after being impacted by a tree branch at a frequent walking route on Tuesday.
Also in the capital, a individual was blown onto oncoming traffic on a road by a strong gust of wind, in a incident that was filmed in a widely shared car camera footage.
Flights entering and leaving the urban area have been suspended because of the weather, while various routes and public facilities are not operating.
At the same time local leaders have issued a state of emergency, to facilitate emergency management operations.
Labor Protests During Harsh Weather
The powerful gales on Thursday come as numerous of educators, medical professionals and government employees are engaged in what has been termed a "significant labor action", demanding better pay and working conditions.
But the extreme weather has forced them to change various scheduled activities, with some outdoor rallies moved indoors or cancelled.
Comparable winds are also sweeping the neighboring country, ushering in a heatwave to the country's outback.
Agencies have declared flame prohibitions for fear of bushfires.
