Powerful gusts reaching speeds of up to 155km/h (96mph) have caused around 90,000 households lacking electricity and compelled authorities to cancel more than 100 flights, according to local media.
The gales are affecting the complete South Island and lower areas of the northern region, as stated by the weather forecasting body.
The nation's agencies have announced rare red wind warnings - the top caution category - in central regions including Canterbury and Wellington.
Residents have been advised to stay indoors, stay off roads, and prepare for further electricity and network failures.
Extensive Destruction and Crisis Measures
This outage appears to be affecting homes mostly in the southern region, although agencies say that the electricity supply was being gradually reinstated.
Domestic outlets have stated that in various locations roofs have been ripped off houses, whereas trees and electricity poles have been knocked down by the gusts.
Within the capital, a individual was fatally injured after being hit by a falling limb at a popular trail walking spot on earlier this week.
Also in the capital, a female was blown onto approaching vehicles on a street by a intensive burst, in a incident that was recorded in a widely shared car camera footage.
Air travel entering and leaving the city have been halted due to the winds, while some roads and libraries are not operating.
Meanwhile Canterbury officials have declared a crisis declaration, to support recovery activities.
Strike Action Alongside Harsh Weather
The powerful gales on today come as many of teachers, doctors and other public workers are participating in what has been called a "significant labor action", calling for improved salaries and workplace environments.
But the intense climate has pressured them to alter some of their plans, with various open-air gatherings moved indoors or called off.
Comparable winds are also sweeping Australia, causing a high-temperature event to the remote areas.
Agencies have announced flame prohibitions for apprehension regarding forest fires.
