Severe winds hitting speeds of up to 155km/h (96mph) have left around 90,000 properties without power and led officials to cancel over 100 air travel services, as reported by domestic outlets.
These gusts are affecting the whole South Island and southern sections of the North Island, according to the national weather agency.
Officials in New Zealand have announced infrequent red wind warnings - the most severe warning - in central regions including Wellington and Canterbury.
People have been urged to stay indoors, avoid travel, and get ready for more electricity and network failures.
Broad Impact and Emergency Response
This outage seems to be impacting households predominantly in the South Island, although authorities state that energy was being slowly brought back.
Domestic outlets have stated that in various locations roofs have been ripped off houses, whereas utility poles and vegetation have been toppled by the gales.
Within the capital, a man was killed after being impacted by a wooden fragment at a popular trail walking spot on Tuesday.
Meanwhile in Wellington, a woman was blown onto oncoming traffic on a thoroughfare by a strong gust of wind, in a moment that was captured in a popular vehicle recording.
Air travel in and out of the urban area have been cancelled because of the winds, while various routes and public facilities are also closed.
Meanwhile local leaders have declared a crisis declaration, to assist recovery activities.
Work Stoppages Amid Extreme Conditions
The powerful gales on today come as numerous of educators, medical professionals and government employees take part in what has been termed a "mega strike", calling for higher wages and enhanced employment terms.
But the extreme weather has pressured them to alter various scheduled activities, with various open-air gatherings relocated inside or called off.
Comparable winds are also sweeping the neighboring country, causing a period of extreme heat to the nation's interior regions.
Agencies have issued fire bans for fear of wildfires.
