Powerful gales reaching velocities of up to 155km/h (96mph) have resulted in approximately 90,000 homes without power and led agencies to halt more than 100 aircraft departures, based on regional news sources.
The gales are affecting the entire southern region and southern sections of the North Island, according to the country's meteorological service.
Officials in New Zealand have released uncommon red wind warnings - the top caution category - in key areas such as these major districts.
People have been urged to remain inside, avoid travel, and prepare for more electricity and network failures.
The electricity loss is primarily influencing residences mostly in the South Island, while agencies state that power was being gradually reinstated.
Local media have indicated that in certain areas roofs have been ripped off houses, whereas utility poles and vegetation have been toppled by the winds.
In Wellington, a man was fatally injured after being impacted by a wooden fragment at a frequent walking route on earlier this week.
Also in the capital, a female was swept into moving cars on a road by a powerful blast, in a event that was filmed in a popular vehicle recording.
Aircraft services to and from the city have been cancelled due to the weather, and some roads and libraries are also closed.
Simultaneously local leaders have announced a crisis declaration, to facilitate disaster response efforts.
These intense gusts on Thursday coincide with tens of thousands of teachers, doctors and other public workers are participating in what has been termed a "significant labor action", requesting better pay and working conditions.
However the extreme weather has pressured them to alter various scheduled activities, with several external protests shifted to interior venues or abandoned.
Like conditions are affecting the nearby nation, bringing a heatwave to the nation's interior regions.
Agencies have declared burning restrictions for apprehension regarding bushfires.