Severe gales hitting speeds of up to 155km/h (96mph) have caused approximately 90,000 households without power and forced authorities to halt more than 100 air travel services, as reported by local media.
These gusts are influencing the whole South Island and southern sections of the North Island, per the weather forecasting body.
The nation's agencies have announced uncommon severe gust advisories - the most severe warning - in core zones encompassing Wellington and Canterbury.
People have been advised to avoid going outside, stay off roads, and prepare for more power and communication outages.
Widespread Destruction and Emergency Measures
The power cut is primarily influencing residences predominantly in the southern region, although authorities say that energy was being slowly brought back.
Domestic outlets have stated that in some places structures have suffered roof damage, whereas utility poles and vegetation have been toppled by the gusts.
Within the capital, a man was fatally injured after being struck by a tree branch at a frequent walking route on Tuesday.
Additionally in the city, a individual was blown onto oncoming traffic on a street by a intensive burst, in a moment that was captured in a popular vehicle recording.
Flights to and from the metropolis have been suspended due to the weather, while various routes and public facilities are not operating.
At the same time Canterbury officials have declared a state of emergency, to support emergency management operations.
Work Stoppages Amid Extreme Weather
These intense gusts on Thursday come as tens of thousands of school staff, physicians and civil servants are participating in what has been called a "major walkout", demanding better pay and working conditions.
However the severe conditions has compelled them to alter certain arrangements, with some outdoor rallies moved indoors or abandoned.
Comparable winds are also sweeping Australia, bringing a heatwave to the remote areas.
Officials have announced fire bans for concern about forest fires.