Intense gusts reaching speeds of as high as 155km/h (96mph) have resulted in nearly 90,000 households experiencing outages and led authorities to call off over 100 flights, as reported by domestic outlets.
The gales are affecting the complete South Island and lower areas of the northern region, according to the weather forecasting body.
The nation's agencies have issued rare red wind warnings - the top caution category - in central regions such as Canterbury and Wellington.
Locals have been advised to remain inside, avoid travel, and prepare for more power and communication outages.
Broad Impact and Crisis Measures
This outage seems to be impacting residences mostly in the southern region, although authorities state that power was being slowly brought back.
Domestic outlets have stated that in various locations structures have suffered roof damage, whereas utility poles and vegetation have been toppled by the winds.
Within the capital, a person was fatally injured after being struck by a tree branch at a well-known hiking path on earlier this week.
Also in the capital, a female was blown onto oncoming traffic on a road by a powerful blast, in a event that was recorded in a popular vehicle recording.
Aircraft services to and from the metropolis have been halted because of the weather, whereas various routes and public facilities are also closed.
Meanwhile Canterbury officials have issued a state of emergency, to support emergency management operations.
Strike Action Alongside Extreme Weather
The wild winds on Thursday occur while many of educators, medical professionals and government employees are participating in what has been called a "major walkout", calling for better pay and working conditions.
Yet the intense climate has forced them to modify some of their plans, with some outdoor rallies shifted to interior venues or called off.
Like conditions are affecting the nearby nation, causing a period of extreme heat to the remote areas.
Officials have announced burning restrictions for concern about wildfires.
