Powerful winds attaining speeds of approximately 155km/h (96mph) have left around 90,000 properties lacking electricity and led officials to call off in excess of 100 flights, based on local media.
The gales are affecting the entire South Island and lower areas of the northern region, according to the weather forecasting body.
The nation's agencies have released rare high-level wind alerts - the top caution category - in central regions including these major districts.
People have been encouraged to remain inside, avoid travel, and make arrangements for more electricity and network failures.
Extensive Damage and Emergency Measures
The power cut appears to be affecting residences predominantly in the South Island, although agencies say that energy was being restored progressively.
Regional news have stated that in certain areas structures have suffered roof damage, while trees and electricity poles have been brought down by the gusts.
In Wellington, a person was fatally injured after being struck by a tree branch at a popular trail walking spot on earlier this week.
Meanwhile in Wellington, a individual was pushed toward approaching vehicles on a thoroughfare by a powerful blast, in a event that was recorded in a viral dashcam video.
Aircraft services entering and leaving the metropolis have been cancelled due to the weather, while some roads and libraries are not operating.
At the same time authorities in Canterbury have announced a crisis declaration, to facilitate recovery activities.
Work Stoppages During Harsh Conditions
The powerful gales on today come as tens of thousands of teachers, doctors and other public workers take part in what has been termed a "major walkout", calling for improved salaries and workplace environments.
Yet the severe conditions has pressured them to alter certain arrangements, with several external protests relocated inside or abandoned.
Similar gusts are affecting Australia, bringing a high-temperature event to the country's outback.
Officials have issued fire bans for concern about wildfires.
