Intense winds reaching velocities of up to 155km/h (96mph) have resulted in approximately 90,000 homes experiencing outages and led officials to halt more than 100 flights, as reported by regional news sources.
The winds are affecting the whole South Island and lower areas of the North Island, according to the national weather agency.
Officials in New Zealand have announced rare high-level wind alerts - the most severe warning - in core zones including Wellington and Canterbury.
Residents have been advised to remain inside, avoid travel, and get ready for further power and communication outages.
Extensive Impact and Crisis Response
The electricity loss is primarily influencing residences mostly in the southern region, though officials say that the electricity supply was being restored progressively.
Domestic outlets have stated that in some places roofs have been ripped off houses, and trees and electricity poles have been toppled by the winds.
Across Wellington, a man was fatally injured after being struck by a falling limb at a popular trail walking spot on earlier this week.
Meanwhile in Wellington, a individual was blown onto oncoming traffic on a street by a strong gust of wind, in a event that was filmed in a viral dashcam video.
Aircraft services to and from the metropolis have been halted because of the weather, whereas some roads and libraries are shut down.
At the same time authorities in Canterbury have announced a crisis declaration, to support disaster response efforts.
Strike Action During Harsh Conditions
The powerful gales on today occur while many of educators, medical professionals and government employees take part in what has been called a "major walkout", calling for higher wages and enhanced employment terms.
However the intense climate has compelled them to change various scheduled activities, with several external protests shifted to interior venues or called off.
Similar gusts are affecting the nearby nation, ushering in a high-temperature event to the country's outback.
Authorities have announced fire bans for fear of wildfires.
