Intense winds hitting velocities of as high as 155km/h (96mph) have resulted in around 90,000 homes without power and led officials to call off more than 100 flights, as reported by local media.
These gusts are affecting the complete South Island and southern sections of the northern region, as stated by the national weather agency.
The nation's agencies have released rare red wind warnings - the highest alert level - in central regions such as Wellington and Canterbury.
People have been urged to avoid going outside, refrain from journeys, and get ready for additional electricity and network failures.
Extensive Damage and Emergency Response
The power cut seems to be impacting households mainly in the southern region, though authorities say that power was being restored progressively.
Domestic outlets have indicated that in some places roofs have been ripped off houses, and trees and electricity poles have been brought down by the gales.
Across Wellington, a man was fatally injured after being struck by a tree branch at a frequent walking route on earlier this week.
Additionally in the city, a woman was pushed toward moving cars on a road by a intensive burst, in a event that was filmed in a popular vehicle recording.
Aircraft services entering and leaving the metropolis have been suspended due to the gusts, and some roads and libraries are also closed.
Simultaneously local leaders have announced a emergency situation, to support disaster response efforts.
Labor Protests Amid Severe Conditions
The powerful gales on Thursday come as tens of thousands of teachers, doctors and other public workers are participating in what has been called a "major walkout", calling for improved salaries and workplace environments.
Yet the severe conditions has compelled them to alter some of their plans, with various open-air gatherings shifted to interior venues or cancelled.
Like conditions are also sweeping Australia, causing a high-temperature event to the remote areas.
Agencies have announced flame prohibitions for fear of bushfires.
