Severe gusts reaching speeds of approximately 155km/h (96mph) have caused around 90,000 homes without power and led agencies to cancel more than 100 air travel services, according to domestic outlets.
The gales are affecting the entire South Island and southern parts of the northern region, as stated by the country's meteorological service.
The nation's agencies have announced uncommon severe gust advisories - the most severe warning - in key areas including Wellington and Canterbury.
Residents have been advised to stay indoors, avoid travel, and prepare for further power and communication outages.
Widespread Impact and Crisis Response
The power cut seems to be impacting households mainly in the South Island, though officials say that the electricity supply was being restored progressively.
Local media have indicated that in certain areas structures have suffered roof damage, whereas utility poles and vegetation have been toppled by the gusts.
Across Wellington, a man was fatally injured after being struck by a tree branch at a popular trail walking spot on earlier this week.
Additionally in the city, a individual was pushed toward oncoming traffic on a street by a intensive burst, in a incident that was captured in a popular vehicle recording.
Aircraft services to and from the metropolis have been suspended due to the winds, while certain highways and community centers are not operating.
At the same time authorities in Canterbury have declared a state of emergency, to assist recovery activities.
Strike Action Alongside Severe Weather
The powerful gales on Thursday coincide with numerous of educators, medical professionals and government employees take part in what has been called a "major walkout", requesting higher wages and enhanced employment terms.
But the extreme weather has pressured them to change various scheduled activities, with various open-air gatherings shifted to interior venues or cancelled.
Similar gusts are affecting the neighboring country, ushering in a high-temperature event to the remote areas.
Authorities have announced fire bans for concern about forest fires.
