Intense gusts hitting speeds of as high as 155km/h (96mph) have caused approximately 90,000 properties without power and compelled agencies to cancel in excess of 100 flights, based on local media.
The gales are affecting the whole South Island and lower areas of the North Island, per the country's meteorological service.
Officials in New Zealand have issued rare severe gust advisories - the top caution category - in key areas such as these major districts.
People have been encouraged to remain inside, refrain from journeys, and make arrangements for additional utility disruptions.
Broad Destruction and Emergency Measures
The electricity loss seems to be impacting homes predominantly in the South Island, although officials say that the electricity supply was being slowly brought back.
Local media have reported that in certain areas structures have suffered roof damage, whereas power lines and trees have been brought down by the gales.
Across Wellington, a person was fatally injured after being struck by a tree branch at a frequent walking route on Tuesday.
Additionally in the city, a female was pushed toward oncoming traffic on a thoroughfare by a strong gust of wind, in a incident that was captured in a viral dashcam video.
Flights entering and leaving the urban area have been suspended because of the weather, and various routes and public facilities are shut down.
At the same time local leaders have announced a state of emergency, to facilitate disaster response efforts.
Strike Action Amid Harsh Conditions
The wild winds on Thursday coincide with many of school staff, physicians and civil servants are engaged in what has been called a "mega strike", demanding better pay and working conditions.
But the extreme weather has forced them to change some of their plans, with various open-air gatherings shifted to interior venues or called off.
Like conditions are impacting Australia, causing a high-temperature event to the nation's interior regions.
Agencies have issued fire bans for apprehension regarding bushfires.
