Powerful winds hitting velocities of approximately 155km/h (96mph) have left nearly 90,000 homes experiencing outages and led officials to cancel over 100 aircraft departures, according to regional news sources.
The gales are influencing the whole southern region and southern parts of the northern region, according to the country's meteorological service.
Officials in New Zealand have released infrequent red wind warnings - the top caution category - in core zones such as Canterbury and Wellington.
Locals have been encouraged to avoid going outside, stay off roads, and make arrangements for more electricity and network failures.
Widespread Destruction and Emergency Measures
The power cut is primarily influencing homes predominantly in the South Island, although officials report that the electricity supply was being slowly brought back.
Domestic outlets have reported that in various locations structures have suffered roof damage, whereas trees and electricity poles have been knocked down by the gales.
Across Wellington, a man was fatally injured after being impacted by a tree branch at a frequent walking route on Tuesday.
Also in the capital, a female was pushed toward oncoming traffic on a street by a powerful blast, in a incident that was recorded in a viral dashcam video.
Flights to and from the metropolis have been halted due to the gusts, while some roads and libraries are shut down.
Simultaneously authorities in Canterbury have announced a state of emergency, to facilitate emergency management operations.
Strike Action Alongside Harsh Weather
The powerful gales on today come as tens of thousands of teachers, doctors and other public workers take part in what has been called a "major walkout", requesting better pay and working conditions.
However the severe conditions has compelled them to modify some of their plans, with some outdoor rallies relocated inside or called off.
Like conditions are affecting Australia, ushering in a period of extreme heat to the nation's interior regions.
Officials have issued flame prohibitions for fear of bushfires.
