Powerful gales hitting velocities of approximately 155km/h (96mph) have caused approximately 90,000 homes without power and led agencies to halt over 100 flights, based on domestic outlets.
The winds are influencing the whole South Island and southern parts of the North Island, as stated by the weather forecasting body.
New Zealand authorities have released rare red wind warnings - the highest alert level - in core zones including Canterbury and Wellington.
Residents have been advised to avoid going outside, avoid travel, and get ready for further electricity and network failures.
Widespread Damage and Emergency Response
The power cut appears to be affecting residences mainly in the South Island, though officials say that power was being restored progressively.
Domestic outlets have reported that in certain areas roofs have been ripped off houses, whereas trees and electricity poles have been toppled by the winds.
Within the capital, a person was fatally injured after being impacted by a tree branch at a frequent walking route on earlier this week.
Also in the capital, a female was swept into approaching vehicles on a road by a intensive burst, in a incident that was recorded in a widely shared car camera footage.
Air travel to and from the metropolis have been cancelled because of the winds, and some roads and libraries are also closed.
At the same time Canterbury officials have announced a state of emergency, to facilitate disaster response efforts.
Work Stoppages Alongside Extreme Conditions
The wild winds on Thursday come as tens of thousands of school staff, physicians and civil servants are participating in what has been described as a "major walkout", calling for higher wages and enhanced employment terms.
Yet the severe conditions has forced them to modify certain arrangements, with some outdoor rallies moved indoors or called off.
Comparable winds are also sweeping the neighboring country, ushering in a heatwave to the remote areas.
Authorities have declared burning restrictions for concern about forest fires.
