Powerful gales hitting velocities of as high as 155km/h (96mph) have left approximately 90,000 properties lacking electricity and led officials to cancel more than 100 aircraft departures, according to regional news sources.
The winds are affecting the entire South Island and southern sections of the North Island, per the weather forecasting body.
The nation's agencies have issued rare high-level wind alerts - the top caution category - in core zones such as these major districts.
Locals have been urged to stay indoors, stay off roads, and prepare for additional power and communication outages.
Broad Impact and Crisis Response
The power cut seems to be impacting residences mostly in the South Island, though officials say that power was being restored progressively.
Regional news have indicated that in certain areas homes have lost their roofs, and power lines and trees have been knocked down by the gales.
Within the capital, a man was killed after being struck by a tree branch at a frequent walking route on Tuesday.
Additionally in the city, a female was blown onto moving cars on a street by a strong gust of wind, in a moment that was recorded in a popular vehicle recording.
Air travel to and from the city have been cancelled because of the weather, while various routes and public facilities are also closed.
At the same time local leaders have issued a crisis declaration, to assist recovery activities.
Labor Protests Amid Extreme Conditions
The powerful gales on Thursday occur while numerous of school staff, physicians and civil servants take part in what has been described as a "mega strike", calling for better pay and working conditions.
But the severe conditions has pressured them to change certain arrangements, with various open-air gatherings moved indoors or called off.
Like conditions are also sweeping the nearby nation, causing a heatwave to the remote areas.
Authorities have announced fire bans for apprehension regarding wildfires.