Intense gales attaining speeds of up to 155km/h (96mph) have caused nearly 90,000 properties lacking electricity and compelled authorities to halt more than 100 flights, according to domestic outlets.
These gusts are influencing the entire South Island and southern sections of the northern region, according to the national weather agency.
Officials in New Zealand have issued infrequent red wind warnings - the highest alert level - in core zones encompassing these major districts.
People have been urged to remain inside, refrain from journeys, and get ready for further power and communication outages.
Broad Impact and Emergency Measures
The power cut seems to be impacting households predominantly in the southern region, though officials state that the electricity supply was being gradually reinstated.
Domestic outlets have reported that in certain areas roofs have been ripped off houses, whereas trees and electricity poles have been knocked down by the winds.
In Wellington, a individual was killed after being struck by a wooden fragment at a popular trail walking spot on Tuesday.
Also in the capital, a individual was swept into approaching vehicles on a thoroughfare by a powerful blast, in a moment that was captured in a viral dashcam video.
Air travel in and out of the urban area have been cancelled due to the weather, whereas some roads and libraries are also closed.
At the same time local leaders have announced a crisis declaration, to facilitate disaster response efforts.
Work Stoppages Amid Extreme Weather
The powerful gales on Thursday coincide with tens of thousands of teachers, doctors and other public workers take part in what has been termed a "mega strike", calling for better pay and working conditions.
Yet the extreme weather has forced them to modify various scheduled activities, with various open-air gatherings moved indoors or abandoned.
Similar gusts are impacting Australia, ushering in a high-temperature event to the nation's interior regions.
Authorities have announced fire bans for fear of wildfires.
