Intense winds hitting speeds of approximately 155km/h (96mph) have left nearly 90,000 homes without power and led officials to call off over 100 air travel services, based on regional news sources.
The winds are impacting the whole southern region and southern parts of the North Island, per the national weather agency.
Officials in New Zealand have released rare high-level wind alerts - the top caution category - in key areas such as Wellington and Canterbury.
People have been encouraged to stay indoors, stay off roads, and prepare for more utility disruptions.
Extensive Destruction and Emergency Measures
The power cut appears to be affecting residences predominantly in the South Island, although agencies state that power was being restored progressively.
Regional news have reported that in certain areas roofs have been ripped off houses, and power lines and trees have been toppled by the winds.
Within the capital, a man was lost his life after being impacted by a tree branch at a well-known hiking path on Tuesday.
Also in the capital, a female was pushed toward moving cars on a road by a strong gust of wind, in a moment that was recorded in a popular vehicle recording.
Flights entering and leaving the city have been halted as a result of the gusts, while some roads and libraries are also closed.
Meanwhile authorities in Canterbury have announced a crisis declaration, to support recovery activities.
Work Stoppages During Harsh Weather
The wild winds on Thursday come as tens of thousands of educators, medical professionals and government employees take part in what has been called a "mega strike", requesting better pay and working conditions.
Yet the extreme weather has pressured them to change some of their plans, with several external protests moved indoors or called off.
Like conditions are also sweeping the neighboring country, causing a period of extreme heat to the country's outback.
Agencies have issued burning restrictions for apprehension regarding forest fires.