Intense gales reaching speeds of approximately 155km/h (96mph) have resulted in approximately 90,000 households without power and led agencies to call off over 100 air travel services, based on domestic outlets.
The winds are impacting the complete southern region and lower areas of the North Island, according to the weather forecasting body.
New Zealand authorities have announced infrequent high-level wind alerts - the most severe warning - in core zones including Canterbury and Wellington.
People have been urged to avoid going outside, refrain from journeys, and get ready for additional utility disruptions.
Extensive Impact and Emergency Response
The power cut is primarily influencing homes mainly in the South Island, though authorities report that the electricity supply was being slowly brought back.
Regional news have reported that in some places roofs have been ripped off houses, while power lines and trees have been brought down by the gales.
Across Wellington, a person was fatally injured after being impacted by a wooden fragment at a frequent walking route on Tuesday.
Also in the capital, a individual was swept into approaching vehicles on a street by a intensive burst, in a moment that was filmed in a popular vehicle recording.
Air travel to and from the metropolis have been cancelled due to the gusts, while some roads and libraries are shut down.
Simultaneously authorities in Canterbury have declared a crisis declaration, to assist emergency management operations.
Work Stoppages Amid Harsh Weather
These intense gusts on Thursday come as tens of thousands of school staff, physicians and civil servants are engaged in what has been called a "significant labor action", demanding better pay and working conditions.
However the severe conditions has compelled them to modify various scheduled activities, with several external protests shifted to interior venues or cancelled.
Similar gusts are also sweeping Australia, ushering in a heatwave to the country's outback.
Authorities have declared burning restrictions for fear of bushfires.
