Intense gusts hitting speeds of as high as 155km/h (96mph) have resulted in around 90,000 properties experiencing outages and led officials to call off more than 100 aircraft departures, according to domestic outlets.
The gales are affecting the complete South Island and lower areas of the North Island, as stated by the weather forecasting body.
New Zealand authorities have released infrequent high-level wind alerts - the highest alert level - in core zones such as these major districts.
People have been urged to remain inside, stay off roads, and get ready for more power and communication outages.
Extensive Destruction and Emergency Measures
The electricity loss seems to be impacting residences mainly in the southern region, while agencies state that power was being restored progressively.
Domestic outlets have reported that in some places roofs have been ripped off houses, and utility poles and vegetation have been toppled by the winds.
Across Wellington, a person was fatally injured after being struck by a wooden fragment at a popular trail walking spot on earlier this week.
Also in the capital, a female was pushed toward oncoming traffic on a thoroughfare by a powerful blast, in a moment that was filmed in a popular vehicle recording.
Flights to and from the metropolis have been halted due to the weather, whereas some roads and libraries are also closed.
At the same time Canterbury officials have announced a state of emergency, to facilitate disaster response efforts.
Strike Action Alongside Harsh Weather
The powerful gales on this day occur while numerous of educators, medical professionals and government employees take part in what has been described as a "major walkout", demanding improved salaries and workplace environments.
But the severe conditions has compelled them to modify some of their plans, with various open-air gatherings relocated inside or abandoned.
Similar gusts are also sweeping the nearby nation, causing a high-temperature event to the country's outback.
Officials have issued flame prohibitions for apprehension regarding forest fires.
