Severe winds hitting speeds of up to 155km/h (96mph) have caused nearly 90,000 households without power and forced agencies to call off over 100 flights, as reported by regional news sources.
The winds are affecting the entire South Island and lower areas of the North Island, per the national weather agency.
New Zealand authorities have announced infrequent high-level wind alerts - the highest alert level - in key areas encompassing Wellington and Canterbury.
People have been urged to remain inside, stay off roads, and get ready for more electricity and network failures.
Extensive Destruction and Crisis Measures
The power cut seems to be impacting households predominantly in the southern region, though officials say that power was being gradually reinstated.
Regional news have indicated that in certain areas homes have lost their roofs, whereas power lines and trees have been toppled by the gales.
Within the capital, a person was killed after being hit by a falling limb at a popular trail walking spot on Tuesday.
Also in the capital, a woman was blown onto approaching vehicles on a thoroughfare by a strong gust of wind, in a event that was recorded in a popular vehicle recording.
Flights in and out of the metropolis have been cancelled as a result of the weather, whereas various routes and public facilities are also closed.
At the same time local leaders have announced a crisis declaration, to assist recovery activities.
Work Stoppages Amid Harsh Conditions
The wild winds on this day come as many of teachers, doctors and other public workers are engaged in what has been called a "major walkout", demanding improved salaries and workplace environments.
However the extreme weather has pressured them to alter certain arrangements, with various open-air gatherings relocated inside or called off.
Like conditions are impacting Australia, ushering in a heatwave to the remote areas.
Officials have issued fire bans for fear of wildfires.