Severe gales reaching velocities of as high as 155km/h (96mph) have caused nearly 90,000 households without power and led officials to cancel over 100 air travel services, based on local media.
These gusts are impacting the whole southern region and lower areas of the northern region, according to the weather forecasting body.
Officials in New Zealand have issued rare red wind warnings - the top caution category - in key areas including Wellington and Canterbury.
Residents have been encouraged to stay indoors, avoid travel, and prepare for additional utility disruptions.
Widespread Destruction and Crisis Response
The power cut seems to be impacting residences predominantly in the South Island, although authorities state that power was being slowly brought back.
Domestic outlets have stated that in various locations roofs have been ripped off houses, whereas trees and electricity poles have been toppled by the winds.
In Wellington, a person was killed after being hit by a tree branch at a well-known hiking path on earlier this week.
Meanwhile in Wellington, a individual was pushed toward approaching vehicles on a road by a intensive burst, in a event that was captured in a widely shared car camera footage.
Air travel entering and leaving the city have been halted due to the winds, whereas some roads and libraries are also closed.
At the same time Canterbury officials have issued a crisis declaration, to facilitate emergency management operations.
Work Stoppages During Harsh Weather
The powerful gales on Thursday come as tens of thousands of educators, medical professionals and government employees are engaged in what has been termed a "mega strike", requesting higher wages and enhanced employment terms.
Yet the severe conditions has pressured them to change some of their plans, with some outdoor rallies moved indoors or abandoned.
Similar gusts are affecting Australia, bringing a high-temperature event to the nation's interior regions.
Authorities have announced flame prohibitions for apprehension regarding wildfires.
