Intense gusts hitting speeds of up to 155km/h (96mph) have resulted in around 90,000 properties lacking electricity and forced officials to halt in excess of 100 aircraft departures, based on domestic outlets.
The winds are affecting the entire southern region and lower areas of the northern region, as stated by the national weather agency.
Officials in New Zealand have issued infrequent red wind warnings - the highest alert level - in core zones including Canterbury and Wellington.
Residents have been encouraged to stay indoors, avoid travel, and prepare for more utility disruptions.
Extensive Impact and Emergency Response
This outage is primarily influencing households mostly in the South Island, though officials state that energy was being slowly brought back.
Domestic outlets have reported that in certain areas structures have suffered roof damage, and power lines and trees have been toppled by the winds.
In Wellington, a person was killed after being hit by a falling limb at a popular trail walking spot on earlier this week.
Additionally in the city, a woman was swept into moving cars on a street by a strong gust of wind, in a incident that was captured in a widely shared car camera footage.
Air travel entering and leaving the metropolis have been suspended as a result of the gusts, and various routes and public facilities are shut down.
Meanwhile local leaders have issued a state of emergency, to support recovery activities.
Labor Protests Amid Harsh Weather
The powerful gales on Thursday occur while numerous of school staff, physicians and civil servants are participating in what has been called a "mega strike", requesting higher wages and enhanced employment terms.
Yet the intense climate has forced them to modify certain arrangements, with some outdoor rallies relocated inside or cancelled.
Similar gusts are also sweeping the neighboring country, bringing a heatwave to the nation's interior regions.
Officials have declared fire bans for apprehension regarding bushfires.