Severe winds hitting velocities of up to 155km/h (96mph) have resulted in around 90,000 homes lacking electricity and forced authorities to cancel more than 100 air travel services, based on regional news sources.
The gales are impacting the whole South Island and southern sections of the northern region, according to the weather forecasting body.
New Zealand authorities have released infrequent severe gust advisories - the top caution category - in core zones such as Wellington and Canterbury.
Residents have been encouraged to remain inside, refrain from journeys, and get ready for additional utility disruptions.
Broad Damage and Crisis Response
The electricity loss is primarily influencing homes mainly in the South Island, though agencies state that the electricity supply was being restored progressively.
Regional news have reported that in certain areas roofs have been ripped off houses, whereas power lines and trees have been brought down by the winds.
Across Wellington, a individual was killed after being impacted by a tree branch at a popular trail walking spot on Tuesday.
Meanwhile in Wellington, a female was swept into moving cars on a thoroughfare by a powerful blast, in a event that was captured in a viral dashcam video.
Air travel to and from the urban area have been suspended due to the gusts, whereas various routes and public facilities are shut down.
At the same time Canterbury officials have announced a crisis declaration, to support disaster response efforts.
Labor Protests Amid Severe Conditions
The powerful gales on Thursday coincide with tens of thousands of school staff, physicians and civil servants take part in what has been termed a "mega strike", requesting improved salaries and workplace environments.
Yet the intense climate has forced them to modify some of their plans, with some outdoor rallies moved indoors or cancelled.
Comparable winds are impacting the neighboring country, bringing a high-temperature event to the nation's interior regions.
Officials have announced burning restrictions for apprehension regarding forest fires.
