Severe gusts reaching velocities of as high as 155km/h (96mph) have left around 90,000 homes without power and forced officials to cancel over 100 flights, as reported by local media.
The winds are affecting the complete South Island and southern sections of the northern region, according to the weather forecasting body.
New Zealand authorities have announced uncommon red wind warnings - the most severe warning - in central regions encompassing Wellington and Canterbury.
Residents have been advised to avoid going outside, stay off roads, and make arrangements for further utility disruptions.
Widespread Impact and Crisis Response
This outage appears to be affecting households mainly in the southern region, though authorities report that the electricity supply was being gradually reinstated.
Domestic outlets have reported that in various locations roofs have been ripped off houses, while trees and electricity poles have been toppled by the gusts.
In Wellington, a man was killed after being hit by a falling limb at a frequent walking route on earlier this week.
Also in the capital, a individual was pushed toward oncoming traffic on a street by a strong gust of wind, in a moment that was filmed in a viral dashcam video.
Air travel entering and leaving the city have been halted due to the winds, while certain highways and community centers are not operating.
At the same time local leaders have declared a crisis declaration, to assist emergency management operations.
Strike Action During Severe Weather
These intense gusts on today coincide with tens of thousands of teachers, doctors and other public workers take part in what has been described as a "significant labor action", demanding higher wages and enhanced employment terms.
But the severe conditions has compelled them to alter various scheduled activities, with various open-air gatherings relocated inside or abandoned.
Comparable winds are affecting Australia, bringing a heatwave to the nation's interior regions.
Officials have declared burning restrictions for apprehension regarding wildfires.
