Intense gusts attaining velocities of up to 155km/h (96mph) have caused around 90,000 households lacking electricity and compelled authorities to call off over 100 air travel services, based on regional news sources.
The winds are influencing the complete South Island and southern sections of the North Island, per the national weather agency.
The nation's agencies have released uncommon red wind warnings - the highest alert level - in key areas including Wellington and Canterbury.
Locals have been urged to remain inside, refrain from journeys, and get ready for more electricity and network failures.
Extensive Damage and Crisis Response
The power cut seems to be impacting households mostly in the South Island, though officials state that energy was being gradually reinstated.
Domestic outlets have reported that in some places roofs have been ripped off houses, and power lines and trees have been toppled by the gusts.
In Wellington, a man was lost his life after being struck by a falling limb at a popular trail walking spot on earlier this week.
Additionally in the city, a female was blown onto oncoming traffic on a thoroughfare by a powerful blast, in a incident that was recorded in a widely shared car camera footage.
Flights in and out of the metropolis have been halted because of the winds, while certain highways and community centers are also closed.
At the same time local leaders have issued a crisis declaration, to support emergency management operations.
Strike Action Amid Severe Conditions
The powerful gales on Thursday come as tens of thousands of educators, medical professionals and government employees are engaged in what has been described as a "significant labor action", calling for improved salaries and workplace environments.
But the severe conditions has compelled them to modify some of their plans, with some outdoor rallies relocated inside or abandoned.
Similar gusts are also sweeping the nearby nation, ushering in a high-temperature event to the remote areas.
Agencies have announced fire bans for apprehension regarding wildfires.
