Intense gusts attaining velocities of as high as 155km/h (96mph) have caused approximately 90,000 households without power and forced authorities to cancel more than 100 aircraft departures, as reported by local media.
The gales are affecting the whole South Island and southern parts of the North Island, as stated by the weather forecasting body.
New Zealand authorities have issued rare red wind warnings - the highest alert level - in key areas including Canterbury and Wellington.
Locals have been advised to avoid going outside, stay off roads, and get ready for additional utility disruptions.
Widespread Damage and Emergency Response
The power cut is primarily influencing households predominantly in the South Island, although agencies state that power was being slowly brought back.
Regional news have stated that in various locations structures have suffered roof damage, and trees and electricity poles have been toppled by the gusts.
Across Wellington, a man was killed after being hit by a falling limb at a frequent walking route on earlier this week.
Additionally in the city, a female was swept into approaching vehicles on a thoroughfare by a intensive burst, in a incident that was filmed in a popular vehicle recording.
Air travel in and out of the metropolis have been suspended as a result of the winds, whereas some roads and libraries are not operating.
At the same time Canterbury officials have announced a state of emergency, to facilitate disaster response efforts.
Labor Protests Alongside Harsh Weather
These intense gusts on this day coincide with numerous of teachers, doctors and other public workers take part in what has been called a "significant labor action", requesting higher wages and enhanced employment terms.
But the severe conditions has forced them to change various scheduled activities, with some outdoor rallies shifted to interior venues or called off.
Comparable winds are also sweeping Australia, ushering in a heatwave to the remote areas.
Agencies have announced flame prohibitions for apprehension regarding bushfires.
