Intense winds reaching speeds of up to 155km/h (96mph) have caused approximately 90,000 homes without power and forced agencies to cancel in excess of 100 flights, as reported by local media.
These gusts are affecting the complete southern region and southern sections of the North Island, according to the weather forecasting body.
Officials in New Zealand have announced infrequent high-level wind alerts - the highest alert level - in central regions encompassing these major districts.
People have been advised to stay indoors, stay off roads, and get ready for further utility disruptions.
Widespread Destruction and Emergency Measures
The power cut appears to be affecting households mainly in the South Island, though agencies report that power was being gradually reinstated.
Local media have stated that in certain areas structures have suffered roof damage, and utility poles and vegetation have been brought down by the winds.
In Wellington, a man was killed after being impacted by a wooden fragment at a well-known hiking path on earlier this week.
Meanwhile in Wellington, a female was blown onto oncoming traffic on a street by a intensive burst, in a event that was captured in a widely shared car camera footage.
Flights in and out of the metropolis have been suspended because of the gusts, while various routes and public facilities are not operating.
Simultaneously authorities in Canterbury have issued a state of emergency, to support recovery activities.
Strike Action During Harsh Weather
These intense gusts on this day occur while tens of thousands of educators, medical professionals and government employees are engaged in what has been called a "major walkout", demanding improved salaries and workplace environments.
However the extreme weather has compelled them to modify some of their plans, with several external protests relocated inside or abandoned.
Similar gusts are affecting the neighboring country, bringing a period of extreme heat to the country's outback.
Authorities have announced burning restrictions for fear of wildfires.
