Powerful gusts hitting speeds of approximately 155km/h (96mph) have resulted in approximately 90,000 homes lacking electricity and led officials to call off more than 100 aircraft departures, based on domestic outlets.
The gales are affecting the whole South Island and southern parts of the North Island, according to the weather forecasting body.
Officials in New Zealand have announced uncommon red wind warnings - the highest alert level - in central regions such as Wellington and Canterbury.
Locals have been advised to avoid going outside, avoid travel, and get ready for further electricity and network failures.
Broad Impact and Emergency Measures
The power cut seems to be impacting households mostly in the South Island, although authorities say that power was being gradually reinstated.
Domestic outlets have indicated that in certain areas structures have suffered roof damage, whereas trees and electricity poles have been brought down by the winds.
Across Wellington, a man was killed after being impacted by a falling limb at a popular trail walking spot on earlier this week.
Additionally in the city, a woman was blown onto approaching vehicles on a thoroughfare by a intensive burst, in a incident that was filmed in a popular vehicle recording.
Flights entering and leaving the metropolis have been halted due to the winds, and various routes and public facilities are not operating.
Meanwhile authorities in Canterbury have declared a state of emergency, to support disaster response efforts.
Work Stoppages During Harsh Conditions
The powerful gales on today coincide with tens of thousands of school staff, physicians and civil servants are participating in what has been called a "significant labor action", calling for better pay and working conditions.
Yet the severe conditions has forced them to alter certain arrangements, with some outdoor rallies shifted to interior venues or called off.
Like conditions are also sweeping the neighboring country, bringing a heatwave to the nation's interior regions.
Officials have announced burning restrictions for fear of bushfires.
