Severe gales reaching velocities of as high as 155km/h (96mph) have resulted in nearly 90,000 homes experiencing outages and led officials to halt over 100 aircraft departures, based on local media.
These gusts are impacting the entire South Island and southern parts of the North Island, per the country's meteorological service.
New Zealand authorities have announced infrequent severe gust advisories - the highest alert level - in central regions such as Canterbury and Wellington.
People have been urged to remain inside, refrain from journeys, and get ready for further utility disruptions.
Broad Damage and Emergency Measures
The power cut appears to be affecting residences mainly in the South Island, while officials say that the electricity supply was being slowly brought back.
Domestic outlets have stated that in various locations structures have suffered roof damage, whereas power lines and trees have been toppled by the gusts.
In Wellington, a man was killed after being struck by a tree branch at a popular trail walking spot on Tuesday.
Also in the capital, a female was blown onto moving cars on a street by a strong gust of wind, in a moment that was captured in a widely shared car camera footage.
Aircraft services entering and leaving the city have been cancelled because of the winds, and some roads and libraries are also closed.
Meanwhile Canterbury officials have announced a emergency situation, to support emergency management operations.
Strike Action Alongside Severe Weather
These intense gusts on Thursday come as many of school staff, physicians and civil servants take part in what has been described as a "significant labor action", requesting better pay and working conditions.
But the intense climate has pressured them to modify some of their plans, with several external protests shifted to interior venues or called off.
Like conditions are impacting the neighboring country, causing a period of extreme heat to the nation's interior regions.
Officials have declared burning restrictions for concern about forest fires.
