Severe gales hitting velocities of as high as 155km/h (96mph) have resulted in nearly 90,000 households without power and led authorities to cancel more than 100 air travel services, as reported by local media.
The gales are affecting the complete South Island and southern sections of the North Island, according to the national weather agency.
The nation's agencies have announced infrequent red wind warnings - the most severe warning - in central regions such as Wellington and Canterbury.
Locals have been urged to remain inside, avoid travel, and prepare for more electricity and network failures.
Broad Damage and Emergency Response
The power cut appears to be affecting households mostly in the South Island, while officials state that power was being gradually reinstated.
Regional news have reported that in some places homes have lost their roofs, and utility poles and vegetation have been knocked down by the winds.
Across Wellington, a man was killed after being impacted by a tree branch at a well-known hiking path on Tuesday.
Meanwhile in Wellington, a female was swept into oncoming traffic on a street by a intensive burst, in a event that was recorded in a viral dashcam video.
Aircraft services to and from the city have been halted due to the winds, whereas some roads and libraries are not operating.
At the same time local leaders have declared a emergency situation, to assist disaster response efforts.
Work Stoppages Amid Harsh Conditions
The wild winds on this day come as numerous of educators, medical professionals and government employees take part in what has been described as a "mega strike", demanding improved salaries and workplace environments.
Yet the extreme weather has pressured them to modify some of their plans, with some outdoor rallies moved indoors or cancelled.
Similar gusts are impacting the neighboring country, ushering in a heatwave to the remote areas.
Agencies have announced burning restrictions for apprehension regarding wildfires.