Intense gusts hitting velocities of up to 155km/h (96mph) have caused around 90,000 properties experiencing outages and forced officials to call off more than 100 air travel services, according to local media.
These gusts are influencing the complete South Island and southern parts of the North Island, according to the national weather agency.
The nation's agencies have released uncommon red wind warnings - the highest alert level - in central regions encompassing Canterbury and Wellington.
People have been advised to stay indoors, refrain from journeys, and get ready for further utility disruptions.
Extensive Impact and Emergency Response
The power cut appears to be affecting residences mostly in the South Island, though authorities report that power was being restored progressively.
Regional news have indicated that in certain areas homes have lost their roofs, whereas power lines and trees have been knocked down by the gusts.
Across Wellington, a man was fatally injured after being hit by a falling limb at a popular trail walking spot on earlier this week.
Additionally in the city, a female was swept into approaching vehicles on a road by a strong gust of wind, in a moment that was captured in a viral dashcam video.
Aircraft services to and from the metropolis have been halted due to the winds, while various routes and public facilities are shut down.
At the same time local leaders have issued a state of emergency, to support emergency management operations.
Work Stoppages During Severe Weather
The powerful gales on Thursday coincide with numerous of teachers, doctors and other public workers are participating in what has been termed a "mega strike", demanding improved salaries and workplace environments.
But the intense climate has pressured them to alter various scheduled activities, with several external protests moved indoors or abandoned.
Like conditions are affecting the neighboring country, ushering in a high-temperature event to the nation's interior regions.
Authorities have announced fire bans for concern about bushfires.
