Powerful gusts hitting velocities of up to 155km/h (96mph) have resulted in around 90,000 properties experiencing outages and forced officials to halt over 100 aircraft departures, as reported by local media.
These gusts are influencing the entire South Island and lower areas of the northern region, per the national weather agency.
The nation's agencies have released uncommon red wind warnings - the top caution category - in core zones encompassing Canterbury and Wellington.
People have been advised to avoid going outside, refrain from journeys, and prepare for more utility disruptions.
Extensive Destruction and Emergency Measures
The electricity loss appears to be affecting households predominantly in the southern region, though officials report that the electricity supply was being gradually reinstated.
Local media have indicated that in certain areas structures have suffered roof damage, and trees and electricity poles have been knocked down by the gusts.
Across Wellington, a individual was killed after being impacted by a tree branch at a well-known hiking path on Tuesday.
Additionally in the city, a female was swept into oncoming traffic on a thoroughfare by a strong gust of wind, in a incident that was recorded in a widely shared car camera footage.
Flights entering and leaving the city have been cancelled as a result of the gusts, while some roads and libraries are also closed.
Meanwhile Canterbury officials have announced a crisis declaration, to assist disaster response efforts.
Strike Action Amid Harsh Weather
The wild winds on this day occur while tens of thousands of educators, medical professionals and government employees are engaged in what has been called a "major walkout", demanding higher wages and enhanced employment terms.
However the extreme weather has pressured them to alter certain arrangements, with some outdoor rallies relocated inside or cancelled.
Comparable winds are impacting the nearby nation, causing a period of extreme heat to the country's outback.
Authorities have announced burning restrictions for concern about bushfires.
