Powerful gusts hitting velocities of as high as 155km/h (96mph) have caused approximately 90,000 homes without power and forced officials to call off in excess of 100 flights, based on regional news sources.
The winds are affecting the complete South Island and lower areas of the North Island, as stated by the weather forecasting body.
The nation's agencies have announced uncommon high-level wind alerts - the most severe warning - in core zones encompassing Canterbury and Wellington.
Locals have been urged to stay indoors, avoid travel, and make arrangements for further electricity and network failures.
Extensive Destruction and Emergency Response
The electricity loss appears to be affecting households mainly in the southern region, although agencies state that power was being restored progressively.
Regional news have reported that in various locations roofs have been ripped off houses, whereas power lines and trees have been brought down by the winds.
In Wellington, a man was fatally injured after being struck by a wooden fragment at a frequent walking route on Tuesday.
Meanwhile in Wellington, a female was blown onto approaching vehicles on a road by a powerful blast, in a incident that was filmed in a popular vehicle recording.
Air travel to and from the city have been halted due to the weather, and certain highways and community centers are not operating.
Meanwhile authorities in Canterbury have announced a state of emergency, to facilitate recovery activities.
Strike Action Alongside Extreme Conditions
These intense gusts on Thursday occur while tens of thousands of teachers, doctors and other public workers are participating in what has been described as a "major walkout", demanding better pay and working conditions.
Yet the intense climate has forced them to modify various scheduled activities, with some outdoor rallies shifted to interior venues or called off.
Like conditions are also sweeping the nearby nation, ushering in a heatwave to the country's outback.
Authorities have announced flame prohibitions for apprehension regarding wildfires.
