Severe gales hitting speeds of as high as 155km/h (96mph) have left nearly 90,000 properties lacking electricity and led authorities to cancel over 100 flights, based on local media.
These gusts are influencing the complete South Island and southern parts of the northern region, according to the national weather agency.
The nation's agencies have released rare high-level wind alerts - the most severe warning - in core zones such as Canterbury and Wellington.
Locals have been advised to remain inside, stay off roads, and prepare for further electricity and network failures.
Extensive Destruction and Emergency Response
The electricity loss seems to be impacting homes predominantly in the South Island, though agencies state that the electricity supply was being slowly brought back.
Local media have stated that in certain areas homes have lost their roofs, while power lines and trees have been knocked down by the winds.
Across Wellington, a man was fatally injured after being struck by a wooden fragment at a popular trail walking spot on earlier this week.
Meanwhile in Wellington, a woman was blown onto oncoming traffic on a thoroughfare by a intensive burst, in a moment that was captured in a popular vehicle recording.
Aircraft services entering and leaving the metropolis have been halted because of the gusts, whereas various routes and public facilities are also closed.
At the same time Canterbury officials have announced a state of emergency, to support emergency management operations.
Work Stoppages Alongside Harsh Weather
These intense gusts on today coincide with tens of thousands of teachers, doctors and other public workers are engaged in what has been called a "major walkout", calling for better pay and working conditions.
But the extreme weather has compelled them to alter some of their plans, with various open-air gatherings shifted to interior venues or called off.
Like conditions are also sweeping the nearby nation, causing a period of extreme heat to the country's outback.
Authorities have declared fire bans for apprehension regarding forest fires.
