Severe winds reaching speeds of as high as 155km/h (96mph) have resulted in nearly 90,000 properties lacking electricity and forced authorities to call off more than 100 flights, as reported by local media.
These gusts are affecting the complete South Island and lower areas of the North Island, according to the country's meteorological service.
The nation's agencies have issued infrequent red wind warnings - the most severe warning - in key areas encompassing these major districts.
Residents have been urged to avoid going outside, avoid travel, and prepare for additional electricity and network failures.
Widespread Damage and Crisis Response
The power cut seems to be impacting homes mostly in the southern region, although authorities report that the electricity supply was being restored progressively.
Local media have stated that in certain areas homes have lost their roofs, and trees and electricity poles have been knocked down by the gusts.
In Wellington, a man was killed after being struck by a tree branch at a well-known hiking path on Tuesday.
Also in the capital, a woman was swept into approaching vehicles on a street by a intensive burst, in a moment that was captured in a viral dashcam video.
Aircraft services entering and leaving the metropolis have been halted as a result of the winds, while various routes and public facilities are shut down.
Simultaneously authorities in Canterbury have issued a crisis declaration, to support disaster response efforts.
Labor Protests Amid Extreme Conditions
The powerful gales on Thursday coincide with tens of thousands of school staff, physicians and civil servants take part in what has been termed a "mega strike", calling for higher wages and enhanced employment terms.
However the intense climate has compelled them to alter some of their plans, with several external protests relocated inside or cancelled.
Like conditions are also sweeping the neighboring country, ushering in a heatwave to the country's outback.
Agencies have announced fire bans for fear of wildfires.
