Severe winds reaching speeds of as high as 155km/h (96mph) have left nearly 90,000 homes experiencing outages and led officials to cancel more than 100 aircraft departures, according to regional news sources.
The winds are impacting the entire South Island and southern parts of the North Island, per the country's meteorological service.
Officials in New Zealand have announced rare red wind warnings - the top caution category - in core zones encompassing these major districts.
Locals have been encouraged to stay indoors, stay off roads, and prepare for additional electricity and network failures.
Extensive Impact and Emergency Response
The power cut seems to be impacting residences mostly in the southern region, though agencies state that energy was being restored progressively.
Domestic outlets have reported that in various locations structures have suffered roof damage, while power lines and trees have been knocked down by the gusts.
Within the capital, a person was lost his life after being hit by a falling limb at a popular trail walking spot on Tuesday.
Also in the capital, a woman was pushed toward moving cars on a street by a strong gust of wind, in a incident that was recorded in a viral dashcam video.
Flights in and out of the metropolis have been cancelled because of the winds, whereas certain highways and community centers are also closed.
Meanwhile Canterbury officials have declared a state of emergency, to support emergency management operations.
Strike Action Alongside Severe Weather
The powerful gales on Thursday coincide with tens of thousands of school staff, physicians and civil servants take part in what has been described as a "mega strike", calling for improved salaries and workplace environments.
But the severe conditions has forced them to alter various scheduled activities, with some outdoor rallies moved indoors or cancelled.
Like conditions are also sweeping the neighboring country, bringing a period of extreme heat to the remote areas.
Authorities have issued fire bans for fear of forest fires.