Intense gusts reaching speeds of up to 155km/h (96mph) have caused around 90,000 homes without power and forced officials to call off over 100 aircraft departures, as reported by local media.
The winds are influencing the complete southern region and lower areas of the North Island, as stated by the weather forecasting body.
The nation's agencies have announced uncommon high-level wind alerts - the top caution category - in key areas such as Canterbury and Wellington.
People have been urged to avoid going outside, stay off roads, and make arrangements for more utility disruptions.
Widespread Destruction and Crisis Measures
The power cut is primarily influencing residences predominantly in the southern region, though officials say that the electricity supply was being gradually reinstated.
Regional news have indicated that in some places structures have suffered roof damage, and power lines and trees have been knocked down by the gales.
In Wellington, a man was killed after being hit by a falling limb at a well-known hiking path on Tuesday.
Additionally in the city, a woman was blown onto moving cars on a thoroughfare by a strong gust of wind, in a incident that was filmed in a popular vehicle recording.
Aircraft services entering and leaving the urban area have been suspended as a result of the weather, whereas some roads and libraries are shut down.
At the same time local leaders have announced a state of emergency, to support recovery activities.
Work Stoppages Amid Severe Weather
These intense gusts on this day come as numerous of teachers, doctors and other public workers are engaged in what has been called a "significant labor action", requesting better pay and working conditions.
Yet the extreme weather has compelled them to change some of their plans, with some outdoor rallies relocated inside or cancelled.
Like conditions are impacting the nearby nation, ushering in a heatwave to the nation's interior regions.
Authorities have declared fire bans for concern about forest fires.
