Severe winds hitting velocities of approximately 155km/h (96mph) have caused around 90,000 properties lacking electricity and led officials to halt over 100 flights, based on domestic outlets.
The gales are impacting the whole southern region and lower areas of the North Island, according to the weather forecasting body.
New Zealand authorities have announced infrequent severe gust advisories - the most severe warning - in central regions encompassing Canterbury and Wellington.
Residents have been advised to stay indoors, stay off roads, and prepare for further utility disruptions.
Widespread Destruction and Crisis Measures
The power cut is primarily influencing homes mostly in the South Island, while authorities state that power was being gradually reinstated.
Regional news have stated that in some places homes have lost their roofs, whereas trees and electricity poles have been brought down by the gales.
In Wellington, a individual was killed after being struck by a falling limb at a well-known hiking path on earlier this week.
Meanwhile in Wellington, a woman was swept into oncoming traffic on a road by a intensive burst, in a incident that was filmed in a popular vehicle recording.
Flights in and out of the city have been suspended due to the weather, and various routes and public facilities are not operating.
Meanwhile authorities in Canterbury have announced a state of emergency, to support disaster response efforts.
Strike Action During Severe Conditions
The wild winds on Thursday coincide with tens of thousands of school staff, physicians and civil servants take part in what has been described as a "mega strike", calling for higher wages and enhanced employment terms.
Yet the severe conditions has pressured them to change certain arrangements, with some outdoor rallies moved indoors or cancelled.
Similar gusts are affecting Australia, ushering in a heatwave to the nation's interior regions.
Officials have declared fire bans for fear of bushfires.
