Severe winds hitting velocities of as high as 155km/h (96mph) have left approximately 90,000 households experiencing outages and compelled authorities to call off in excess of 100 flights, according to local media.
The gales are impacting the whole South Island and southern sections of the northern region, according to the country's meteorological service.
Officials in New Zealand have announced uncommon red wind warnings - the top caution category - in core zones including these major districts.
Locals have been advised to stay indoors, avoid travel, and prepare for more utility disruptions.
Broad Impact and Crisis Measures
The power cut appears to be affecting residences mostly in the southern region, while agencies state that power was being gradually reinstated.
Local media have indicated that in various locations structures have suffered roof damage, while trees and electricity poles have been knocked down by the gales.
Across Wellington, a man was killed after being impacted by a tree branch at a well-known hiking path on Tuesday.
Also in the capital, a individual was pushed toward oncoming traffic on a thoroughfare by a strong gust of wind, in a incident that was filmed in a popular vehicle recording.
Air travel to and from the metropolis have been cancelled due to the gusts, while certain highways and community centers are shut down.
Meanwhile authorities in Canterbury have announced a emergency situation, to facilitate recovery activities.
Strike Action Amid Extreme Conditions
The powerful gales on today coincide with many of educators, medical professionals and government employees are participating in what has been termed a "mega strike", demanding higher wages and enhanced employment terms.
Yet the severe conditions has forced them to modify some of their plans, with some outdoor rallies shifted to interior venues or cancelled.
Comparable winds are impacting Australia, ushering in a period of extreme heat to the nation's interior regions.
Authorities have declared fire bans for fear of bushfires.
