Intense winds hitting velocities of up to 155km/h (96mph) have left approximately 90,000 households lacking electricity and forced agencies to call off over 100 air travel services, based on domestic outlets.
These gusts are influencing the complete South Island and southern parts of the northern region, according to the weather forecasting body.
New Zealand authorities have announced rare red wind warnings - the highest alert level - in key areas encompassing Wellington and Canterbury.
People have been encouraged to remain inside, stay off roads, and get ready for more utility disruptions.
Widespread Destruction and Crisis Response
The power cut seems to be impacting households mostly in the South Island, though agencies say that energy was being slowly brought back.
Local media have indicated that in various locations homes have lost their roofs, while trees and electricity poles have been brought down by the gales.
Within the capital, a man was lost his life after being impacted by a wooden fragment at a frequent walking route on earlier this week.
Meanwhile in Wellington, a female was blown onto oncoming traffic on a street by a strong gust of wind, in a incident that was recorded in a widely shared car camera footage.
Aircraft services entering and leaving the metropolis have been cancelled due to the weather, while some roads and libraries are shut down.
Simultaneously Canterbury officials have issued a state of emergency, to assist emergency management operations.
Strike Action Amid Severe Weather
The powerful gales on today coincide with tens of thousands of teachers, doctors and other public workers are participating in what has been termed a "significant labor action", demanding better pay and working conditions.
Yet the severe conditions has compelled them to change various scheduled activities, with various open-air gatherings relocated inside or called off.
Comparable winds are also sweeping Australia, bringing a high-temperature event to the country's outback.
Officials have announced burning restrictions for fear of wildfires.
