Intense winds reaching velocities of approximately 155km/h (96mph) have resulted in nearly 90,000 homes lacking electricity and led authorities to halt over 100 aircraft departures, according to regional news sources.
The gales are impacting the whole southern region and southern parts of the northern region, as stated by the weather forecasting body.
Officials in New Zealand have issued infrequent severe gust advisories - the top caution category - in core zones including Canterbury and Wellington.
Locals have been advised to stay indoors, refrain from journeys, and make arrangements for additional utility disruptions.
Broad Impact and Emergency Response
The electricity loss is primarily influencing homes mostly in the South Island, although authorities report that the electricity supply was being gradually reinstated.
Local media have indicated that in some places roofs have been ripped off houses, whereas power lines and trees have been brought down by the winds.
In Wellington, a person was killed after being hit by a wooden fragment at a popular trail walking spot on Tuesday.
Additionally in the city, a female was swept into approaching vehicles on a road by a intensive burst, in a event that was captured in a viral dashcam video.
Flights in and out of the city have been suspended because of the weather, and some roads and libraries are also closed.
At the same time local leaders have declared a crisis declaration, to assist disaster response efforts.
Strike Action During Harsh Conditions
The powerful gales on Thursday occur while 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.
But the severe conditions has compelled them to alter various scheduled activities, with some outdoor rallies relocated inside or abandoned.
Like conditions are impacting the nearby nation, causing a high-temperature event to the nation's interior regions.
Officials have issued burning restrictions for fear of bushfires.