Powerful winds attaining velocities of as high as 155km/h (96mph) have resulted in approximately 90,000 homes experiencing outages and led agencies to cancel over 100 aircraft departures, as reported by local media.
The gales are influencing the entire South Island and southern sections of the North Island, according to the national weather agency.
Officials in New Zealand have released rare red wind warnings - the top caution category - in central regions including Canterbury and Wellington.
Locals have been advised to remain inside, refrain from journeys, and make arrangements for more electricity and network failures.
Extensive Destruction and Emergency Response
The power cut appears to be affecting homes predominantly in the South Island, though agencies report that the electricity supply was being restored progressively.
Domestic outlets have indicated that in various locations structures have suffered roof damage, whereas power lines and trees have been toppled by the gusts.
Across Wellington, a person was killed after being impacted by a falling limb at a popular trail walking spot on earlier this week.
Also in the capital, a female was blown onto approaching vehicles on a street by a intensive burst, in a incident that was filmed in a viral dashcam video.
Flights in and out of the city have been cancelled because of the gusts, whereas some roads and libraries are not operating.
At the same time Canterbury officials have issued a emergency situation, to facilitate emergency management operations.
Labor Protests During Harsh Weather
These intense gusts on Thursday come as many of teachers, doctors and other public workers are participating in what has been termed a "major walkout", calling for improved salaries and workplace environments.
Yet the intense climate has compelled them to modify certain arrangements, with some outdoor rallies shifted to interior venues or abandoned.
Similar gusts are also sweeping Australia, bringing a period of extreme heat to the country's outback.
Officials have announced flame prohibitions for fear of forest fires.
