Severe winds hitting speeds of as high as 155km/h (96mph) have caused approximately 90,000 homes without power and forced agencies to halt more than 100 flights, based on local media.
The gales are affecting the whole southern region and lower areas of the northern region, per the national weather agency.
Officials in New Zealand have released rare severe gust advisories - the most severe warning - in central regions including these major districts.
People have been encouraged to remain inside, stay off roads, and make arrangements for further electricity and network failures.
Widespread Destruction and Emergency Response
This outage appears to be affecting homes predominantly in the southern region, though authorities state that energy was being gradually reinstated.
Local media have indicated that in certain areas homes have lost their roofs, whereas power lines and trees have been knocked down by the gales.
In Wellington, a person was fatally injured after being struck by a falling limb at a frequent walking route on Tuesday.
Also in the capital, a female was swept into approaching vehicles on a road by a strong gust of wind, in a moment that was filmed in a viral dashcam video.
Air travel to and from the urban area have been suspended due to the winds, whereas various routes and public facilities are also closed.
At the same time Canterbury officials have announced a crisis declaration, to facilitate recovery activities.
Strike Action Amid Extreme Conditions
The wild winds on Thursday come as many of teachers, doctors and other public workers are engaged in what has been termed a "significant labor action", requesting improved salaries and workplace environments.
But the intense climate has forced them to alter certain arrangements, with some outdoor rallies relocated inside or called off.
Comparable winds are impacting Australia, causing a high-temperature event to the country's outback.
Officials have issued flame prohibitions for apprehension regarding bushfires.
