Powerful gales hitting velocities of up to 155km/h (96mph) have resulted in nearly 90,000 households experiencing outages and compelled agencies to cancel over 100 flights, as reported by local media.
The gales are affecting the whole South Island and southern sections of the North Island, as stated by the national weather agency.
Officials in New Zealand have announced uncommon red wind warnings - the most severe warning - in central regions including Wellington and Canterbury.
Residents have been encouraged to avoid going outside, stay off roads, and make arrangements for further utility disruptions.
Widespread Damage and Emergency Response
The power cut seems to be impacting households mainly in the southern region, while agencies report that the electricity supply was being restored progressively.
Domestic outlets have indicated that in some places structures have suffered roof damage, whereas power lines and trees have been toppled by the winds.
In Wellington, a man was killed after being struck by a wooden fragment at a popular trail walking spot on earlier this week.
Additionally in the city, a woman was blown onto oncoming traffic on a road by a intensive burst, in a event that was captured in a widely shared car camera footage.
Flights entering and leaving the metropolis have been suspended because of the gusts, and some roads and libraries are not operating.
Simultaneously Canterbury officials have announced a crisis declaration, to support disaster response efforts.
Work Stoppages Amid Severe Conditions
The powerful gales on Thursday coincide with tens of thousands of school staff, physicians and civil servants are participating in what has been described as a "significant labor action", calling for better pay and working conditions.
Yet the extreme weather has compelled them to alter certain arrangements, with various open-air gatherings moved indoors or called off.
Comparable winds are also sweeping the neighboring country, causing a high-temperature event to the nation's interior regions.
Agencies have announced flame prohibitions for fear of bushfires.