Severe winds reaching velocities of up to 155km/h (96mph) have resulted in nearly 90,000 properties experiencing outages and led agencies to call off over 100 aircraft departures, based on local media.
The gales are affecting the entire South Island and lower areas of the North Island, per the country's meteorological service.
Officials in New Zealand have issued rare severe gust advisories - the top caution category - in key areas such as Wellington and Canterbury.
People have been urged to remain inside, refrain from journeys, and prepare for additional electricity and network failures.
Widespread Destruction and Emergency Response
The power cut appears to be affecting residences predominantly in the southern region, although authorities say that energy was being restored progressively.
Regional news have reported that in various locations roofs have been ripped off houses, while trees and electricity poles have been toppled by the gales.
Within the capital, a person was lost his life after being hit by a tree branch at a popular trail walking spot on earlier this week.
Additionally in the city, a woman was blown onto approaching vehicles on a thoroughfare by a powerful blast, in a moment that was captured in a viral dashcam video.
Flights in and out of the metropolis have been cancelled as a result of the weather, whereas some roads and libraries are also closed.
Simultaneously local leaders have declared a state of emergency, to facilitate recovery activities.
Labor Protests During Severe Conditions
The powerful gales on today coincide with numerous of teachers, doctors and other public workers are participating in what has been termed a "major walkout", demanding improved salaries and workplace environments.
But the intense climate has pressured them to change some of their plans, with some outdoor rallies relocated inside or cancelled.
Similar gusts are affecting Australia, causing a heatwave to the remote areas.
Agencies have announced burning restrictions for concern about bushfires.
