Severe gusts hitting speeds of approximately 155km/h (96mph) have resulted in around 90,000 households lacking electricity and forced officials to call off over 100 aircraft departures, according to local media.
The gales are affecting the entire South Island and lower areas of the North Island, as stated by the national weather agency.
The nation's agencies have issued rare severe gust advisories - the top caution category - in central regions including Wellington and Canterbury.
People have been urged to stay indoors, avoid travel, and prepare for additional electricity and network failures.
Widespread Impact and Emergency Response
This outage appears to be affecting residences mainly in the South Island, while officials state that energy was being slowly brought back.
Domestic outlets have stated that in certain areas roofs have been ripped off houses, and utility poles and vegetation have been brought down by the winds.
Within the capital, a man was lost his life after being struck by a tree branch at a frequent walking route on earlier this week.
Also in the capital, a female was blown onto oncoming traffic on a street by a powerful blast, in a moment that was captured in a viral dashcam video.
Aircraft services in and out of the urban area have been halted as a result of the weather, while certain highways and community centers are also closed.
Meanwhile local leaders have declared a emergency situation, to assist emergency management operations.
Work Stoppages During Extreme Weather
The powerful gales on Thursday occur while many of educators, medical professionals and government employees are participating in what has been called a "major walkout", demanding better pay and working conditions.
However the severe conditions has forced them to change certain arrangements, with some outdoor rallies relocated inside or abandoned.
Similar gusts are affecting the nearby nation, causing a heatwave to the remote areas.
Officials have declared flame prohibitions for fear of bushfires.
