Powerful winds hitting velocities of as high as 155km/h (96mph) have resulted in around 90,000 homes experiencing outages and forced authorities to cancel in excess of 100 aircraft departures, according to local media.
The winds are affecting the complete southern region and lower areas of the North Island, according to the country's meteorological service.
Officials in New Zealand have announced infrequent red wind warnings - the highest alert level - in key areas such as these major districts.
Locals have been advised to avoid going outside, stay off roads, and make arrangements for further utility disruptions.
Extensive Destruction and Crisis Measures
The power cut seems to be impacting residences predominantly in the South Island, though officials state that the electricity supply was being slowly brought back.
Domestic outlets have stated that in some places roofs have been ripped off houses, and power lines and trees have been toppled by the gales.
Across Wellington, a individual was fatally injured after being struck by a tree branch at a frequent walking route on Tuesday.
Additionally in the city, a female was blown onto oncoming traffic on a thoroughfare by a strong gust of wind, in a incident that was captured in a widely shared car camera footage.
Air travel in and out of the city have been halted as a result of the weather, while various routes and public facilities are not operating.
Meanwhile Canterbury officials have declared a state of emergency, to support disaster response efforts.
Strike Action During Harsh Weather
These intense gusts on Thursday occur while many of school staff, physicians and civil servants take part in what has been described as a "major walkout", demanding better pay and working conditions.
However the severe conditions has compelled them to alter certain arrangements, with some outdoor rallies shifted to interior venues or called off.
Comparable winds are affecting the nearby nation, bringing a period of extreme heat to the nation's interior regions.
Authorities have announced burning restrictions for fear of wildfires.
