Powerful winds reaching speeds of as high as 155km/h (96mph) have left around 90,000 homes without power and compelled authorities to call off over 100 aircraft departures, according to local media.
The gales are affecting the complete southern region and lower areas of the northern region, according to the country's meteorological service.
New Zealand authorities have announced rare high-level wind alerts - the top caution category - in key areas encompassing these major districts.
People have been encouraged to remain inside, refrain from journeys, and make arrangements for additional utility disruptions.
Broad Destruction and Crisis Measures
The power cut seems to be impacting homes predominantly in the southern region, although officials report that the electricity supply was being restored progressively.
Local media have reported that in certain areas homes have lost their roofs, and trees and electricity poles have been brought down by the winds.
Within the capital, a person was killed after being struck by a falling limb at a well-known hiking path on Tuesday.
Also in the capital, a individual was blown onto approaching vehicles on a street by a strong gust of wind, in a moment that was filmed in a viral dashcam video.
Air travel to and from the urban area have been halted due to the winds, while various routes and public facilities are not operating.
Meanwhile authorities in Canterbury have announced a emergency situation, to support disaster response efforts.
Strike Action Alongside Extreme Weather
These intense gusts on this day come as many of teachers, doctors and other public workers take part in what has been described as a "mega strike", requesting better pay and working conditions.
But the extreme weather has forced them to change certain arrangements, with several external protests shifted to interior venues or called off.
Similar gusts are affecting the nearby nation, causing a heatwave to the country's outback.
Agencies have announced flame prohibitions for fear of forest fires.
