Intense gusts reaching velocities of up to 155km/h (96mph) have caused approximately 90,000 properties lacking electricity and compelled officials to halt over 100 flights, based on local media.
The winds are influencing the whole southern region and lower areas of the North Island, according to the national weather agency.
New Zealand authorities have announced rare severe gust advisories - the most severe warning - in core zones such as Canterbury and Wellington.
People have been urged to remain inside, avoid travel, and prepare for more power and communication outages.
Broad Impact and Crisis Measures
This outage is primarily influencing households mostly in the South Island, though authorities say that power was being gradually reinstated.
Local media have stated that in various locations structures have suffered roof damage, while power lines and trees have been toppled by the winds.
Within the capital, a person was fatally injured after being struck by a wooden fragment at a well-known hiking path on Tuesday.
Also in the capital, a individual was blown onto moving cars on a road by a powerful blast, in a event that was recorded in a popular vehicle recording.
Air travel entering and leaving the urban area have been halted as a result of the weather, and some roads and libraries are also closed.
Simultaneously Canterbury officials have announced a state of emergency, to facilitate recovery activities.
Work Stoppages Amid Extreme Conditions
The powerful gales on this day occur while numerous of teachers, doctors and other public workers are engaged in what has been termed a "significant labor action", calling for higher wages and enhanced employment terms.
But the intense climate has forced them to change some of their plans, with several external protests moved indoors or abandoned.
Comparable winds are impacting the nearby nation, ushering in a heatwave to the nation's interior regions.
Authorities have issued burning restrictions for concern about bushfires.
