Intense gales hitting velocities of up to 155km/h (96mph) have left nearly 90,000 households without power and led agencies to cancel more than 100 flights, based on domestic outlets.
The gales are influencing the entire South Island and southern sections of the North Island, as stated by the national weather agency.
The nation's agencies have announced uncommon red wind warnings - the top caution category - in key areas including Canterbury and Wellington.
Locals have been advised to remain inside, refrain from journeys, and prepare for further utility disruptions.
Widespread Damage and Crisis Measures
The electricity loss is primarily influencing residences mainly in the southern region, though officials say that power was being gradually reinstated.
Regional news have indicated that in some places homes have lost their roofs, while utility poles and vegetation have been toppled by the gusts.
In Wellington, a man was killed after being impacted by a tree branch at a popular trail walking spot on Tuesday.
Also in the capital, a woman was swept into moving cars on a street by a powerful blast, in a incident that was captured in a popular vehicle recording.
Flights in and out of the urban area have been suspended because of the weather, and certain highways and community centers are not operating.
At the same time local leaders have announced a emergency situation, to assist recovery activities.
Strike Action During Harsh Weather
The wild winds on Thursday come as tens of thousands of teachers, doctors and other public workers take part in what has been called a "major walkout", calling for better pay and working conditions.
However the extreme weather has forced them to alter various scheduled activities, with several external protests moved indoors or called off.
Like conditions are also sweeping the nearby nation, bringing a period of extreme heat to the nation's interior regions.
Agencies have issued burning restrictions for fear of wildfires.
