Severe winds attaining velocities of up to 155km/h (96mph) have caused around 90,000 properties without power and led officials to call off over 100 air travel services, based on domestic outlets.
The winds are impacting the complete South Island and southern sections of the North Island, according to the weather forecasting body.
New Zealand authorities have announced rare red wind warnings - the top caution category - in key areas including these major districts.
People have been encouraged to remain inside, stay off roads, and get ready for more power and communication outages.
Widespread Damage and Crisis Measures
The electricity loss appears to be affecting residences predominantly in the South Island, while authorities report that the electricity supply was being slowly brought back.
Local media have reported that in various locations structures have suffered roof damage, and utility poles and vegetation have been brought down by the gales.
In Wellington, a person was killed after being impacted by a wooden fragment at a well-known hiking path on Tuesday.
Meanwhile in Wellington, a female was blown onto moving cars on a thoroughfare by a powerful blast, in a incident that was captured in a popular vehicle recording.
Flights to and from the metropolis have been suspended due to the gusts, while various routes and public facilities are shut down.
Simultaneously Canterbury officials have declared a state of emergency, to support emergency management operations.
Strike Action Alongside Severe Weather
These intense gusts on today come as tens of thousands of teachers, doctors and other public workers are participating in what has been called a "significant labor action", requesting improved salaries and workplace environments.
However the extreme weather has compelled them to change some of their plans, with some outdoor rallies shifted to interior venues or called off.
Like conditions are also sweeping Australia, ushering in a heatwave to the nation's interior regions.
Officials have announced flame prohibitions for fear of wildfires.
