Intense gales hitting velocities of up to 155km/h (96mph) have caused approximately 90,000 homes without power and led agencies to halt in excess of 100 aircraft departures, based on regional news sources.
These gusts are influencing the complete southern region and southern sections of the northern region, according to the weather forecasting body.
Officials in New Zealand have released rare high-level wind alerts - the highest alert level - in core zones including Wellington and Canterbury.
People have been urged to remain inside, avoid travel, and make arrangements for more utility disruptions.
Widespread Destruction and Emergency Measures
The power cut appears to be affecting households predominantly in the South Island, although officials state that power was being restored progressively.
Local media have indicated that in some places structures have suffered roof damage, whereas power lines and trees have been knocked down by the gusts.
Within the capital, a person was fatally injured after being hit by a falling limb at a well-known hiking path on Tuesday.
Also in the capital, a female was pushed toward oncoming traffic on a thoroughfare by a powerful blast, in a incident that was captured in a viral dashcam video.
Flights to and from the city have been cancelled because of the gusts, while some roads and libraries are shut down.
At the same time authorities in Canterbury have issued a crisis declaration, to facilitate recovery activities.
Labor Protests During Severe Conditions
These intense gusts on Thursday coincide with numerous of educators, medical professionals and government employees are participating in what has been termed a "significant labor action", demanding better pay and working conditions.
Yet the severe conditions has forced them to alter various scheduled activities, with some outdoor rallies moved indoors or abandoned.
Like conditions are impacting the nearby nation, causing a high-temperature event to the remote areas.
Officials have declared fire bans for apprehension regarding forest fires.
