Severe gusts hitting speeds of approximately 155km/h (96mph) have resulted in nearly 90,000 properties experiencing outages and forced authorities to halt over 100 air travel services, according to domestic outlets.
The gales are affecting the complete southern region and southern parts of the northern region, according to the weather forecasting body.
The nation's agencies have released rare red wind warnings - the top caution category - in central regions encompassing Canterbury and Wellington.
Locals have been advised to remain inside, stay off roads, and prepare for further utility disruptions.
Widespread Damage and Crisis Response
This outage seems to be impacting homes mostly in the South Island, although agencies state that power was being restored progressively.
Local media have indicated that in certain areas homes have lost their roofs, whereas utility poles and vegetation have been brought down by the gusts.
In Wellington, a man was lost his life after being hit by a wooden fragment at a frequent walking route on earlier this week.
Meanwhile in Wellington, a woman was swept into moving cars on a road by a strong gust of wind, in a event that was recorded in a popular vehicle recording.
Flights in and out of the urban area have been suspended due to the gusts, while some roads and libraries are also closed.
At the same time Canterbury officials have declared a crisis declaration, to facilitate disaster response efforts.
Strike Action Alongside Harsh Weather
The powerful gales on Thursday coincide with tens of thousands of teachers, doctors and other public workers are engaged in what has been termed a "mega strike", demanding better pay and working conditions.
Yet the severe conditions has forced them to change some of their plans, with several external protests relocated inside or cancelled.
Comparable winds are impacting Australia, causing a heatwave to the country's outback.
Agencies have declared burning restrictions for fear of wildfires.
