Severe gusts hitting speeds of up to 155km/h (96mph) have resulted in around 90,000 properties lacking electricity and forced agencies to halt more than 100 aircraft departures, as reported by local media.
The gales are impacting the entire southern region and lower areas of the northern region, according to the weather forecasting body.
Officials in New Zealand have released rare red wind warnings - the most severe warning - in core zones encompassing Canterbury and Wellington.
Locals have been urged to avoid going outside, avoid travel, and make arrangements for additional utility disruptions.
Extensive Impact and Emergency Response
The power cut is primarily influencing residences predominantly in the South Island, though officials report that power was being gradually reinstated.
Domestic outlets have indicated that in various locations homes have lost their roofs, and utility poles and vegetation have been toppled by the winds.
Across Wellington, a person was lost his life after being impacted by a tree branch at a frequent walking route on Tuesday.
Also in the capital, a female was pushed toward approaching vehicles on a thoroughfare by a strong gust of wind, in a event that was recorded in a viral dashcam video.
Flights in and out of the metropolis have been cancelled as a result of the weather, whereas various routes and public facilities are also closed.
Simultaneously local leaders have declared a emergency situation, to assist disaster response efforts.
Work Stoppages Amid Extreme Weather
The powerful gales on Thursday come as many of teachers, doctors and other public workers take part in what has been called a "major walkout", demanding higher wages and enhanced employment terms.
But the intense climate has forced them to modify various scheduled activities, with some outdoor rallies shifted to interior venues or cancelled.
Comparable winds are affecting the neighboring country, ushering in a high-temperature event to the remote areas.
Authorities have announced fire bans for concern about bushfires.
