Intense winds reaching speeds of as high as 155km/h (96mph) have resulted in approximately 90,000 households lacking electricity and led officials to call off over 100 aircraft departures, based on local media.
The gales are impacting the whole southern region and southern sections of the North Island, according to the country's meteorological service.
New Zealand authorities have announced infrequent red wind warnings - the top caution category - in central regions such as Canterbury and Wellington.
Locals have been advised to stay indoors, refrain from journeys, and prepare for more utility disruptions.
Widespread Destruction and Crisis Response
The power cut appears to be affecting homes predominantly in the southern region, while agencies report that energy was being restored progressively.
Regional news have reported that in certain areas structures have suffered roof damage, and power lines and trees have been brought down by the gales.
Across Wellington, a individual was fatally injured after being hit by a falling limb at a popular trail walking spot on earlier this week.
Also in the capital, a female was swept into moving cars on a road by a strong gust of wind, in a event that was filmed in a popular vehicle recording.
Aircraft services to and from the metropolis have been halted because of the gusts, while some roads and libraries are not operating.
Meanwhile authorities in Canterbury have announced a crisis declaration, to facilitate emergency management operations.
Work Stoppages Amid Severe Conditions
The powerful gales on Thursday come as tens of thousands of teachers, doctors and other public workers take part in what has been called a "significant labor action", demanding improved salaries and workplace environments.
Yet the severe conditions has compelled them to modify some of their plans, with several external protests shifted to interior venues or abandoned.
Similar gusts are also sweeping the nearby nation, ushering in a high-temperature event to the nation's interior regions.
Agencies have declared fire bans for fear of forest fires.
