Severe gusts hitting velocities of up to 155km/h (96mph) have resulted in around 90,000 homes experiencing outages and forced officials to call off more than 100 flights, based on domestic outlets.
The winds are influencing the complete South Island and southern parts of the North Island, according to the country's meteorological service.
Officials in New Zealand have released infrequent high-level wind alerts - the highest alert level - in central regions including these major districts.
Residents have been advised to remain inside, stay off roads, and make arrangements for more utility disruptions.
Extensive Impact and Emergency Measures
The power cut is primarily influencing residences mainly in the southern region, although agencies report that power was being restored progressively.
Domestic outlets have reported that in certain areas roofs have been ripped off houses, and trees and electricity poles have been knocked down by the gusts.
In Wellington, a individual was fatally injured after being hit by a tree branch at a popular trail walking spot on earlier this week.
Also in the capital, a individual was blown onto moving cars on a road by a powerful blast, in a incident that was filmed in a viral dashcam video.
Flights to and from the city have been halted because of the weather, and some roads and libraries are also closed.
Meanwhile local leaders have announced a emergency situation, to facilitate recovery activities.
Labor Protests Alongside Harsh Weather
The wild winds on Thursday coincide with numerous of teachers, doctors and other public workers are engaged in what has been called a "significant labor action", calling for better pay and working conditions.
However the intense climate has pressured them to modify various scheduled activities, with various open-air gatherings relocated inside or cancelled.
Similar gusts are also sweeping Australia, ushering in a heatwave to the nation's interior regions.
Agencies have issued burning restrictions for concern about wildfires.
