Intense gusts attaining velocities of up to 155km/h (96mph) have caused nearly 90,000 households experiencing outages and led officials to halt over 100 flights, based on local media.
The gales are influencing the entire South Island and southern parts of the northern region, per the country's meteorological service.
The nation's agencies have issued uncommon high-level wind alerts - the top caution category - in core zones encompassing these major districts.
Locals have been urged to avoid going outside, refrain from journeys, and get ready for more electricity and network failures.
Extensive Damage and Emergency Measures
The electricity loss is primarily influencing homes predominantly in the South Island, although authorities report that the electricity supply was being restored progressively.
Domestic outlets have indicated that in certain areas structures have suffered roof damage, whereas utility poles and vegetation have been toppled by the winds.
Across Wellington, a person was fatally injured after being struck by a wooden fragment at a popular trail walking spot on Tuesday.
Meanwhile in Wellington, a female was blown onto approaching vehicles on a thoroughfare by a strong gust of wind, in a moment that was recorded in a widely shared car camera footage.
Flights entering and leaving the metropolis have been cancelled as a result of the weather, and certain highways and community centers are also closed.
Meanwhile Canterbury officials have declared a state of emergency, to support emergency management operations.
Strike Action Alongside Harsh Weather
These intense gusts on Thursday come as tens of thousands of educators, medical professionals and government employees are engaged in what has been termed a "significant labor action", calling for improved salaries and workplace environments.
Yet the extreme weather has forced them to alter some of their plans, with some outdoor rallies moved indoors or cancelled.
Like conditions are affecting the nearby nation, causing a heatwave to the nation's interior regions.
Authorities have issued flame prohibitions for concern about forest fires.
