Intense gusts hitting velocities of approximately 155km/h (96mph) have left around 90,000 properties experiencing outages and led authorities to call off more than 100 aircraft departures, as reported by local media.
The winds are influencing the complete southern region and southern sections of the North Island, as stated by the weather forecasting body.
The nation's agencies have issued infrequent high-level wind alerts - the top caution category - in central regions including these major districts.
Locals have been advised to stay indoors, stay off roads, and make arrangements for further electricity and network failures.
Extensive Damage and Crisis Response
The power cut appears to be affecting households predominantly in the southern region, though officials state that the electricity supply was being restored progressively.
Domestic outlets have reported that in certain areas structures have suffered roof damage, and utility poles and vegetation have been toppled by the gales.
Across Wellington, a man was fatally injured after being struck by a wooden fragment at a popular trail walking spot on Tuesday.
Also in the capital, a female was pushed toward oncoming traffic on a street by a powerful blast, in a moment that was filmed in a popular vehicle recording.
Aircraft services to and from the urban area have been suspended due to the weather, while various routes and public facilities are shut down.
Meanwhile Canterbury officials have announced a emergency situation, to support recovery activities.
Strike Action Alongside Severe Conditions
The wild winds on today occur while many of educators, medical professionals and government employees take part in what has been described as a "major walkout", calling for higher wages and enhanced employment terms.
Yet the intense climate has compelled them to alter certain arrangements, with some outdoor rallies relocated inside or abandoned.
Similar gusts are affecting Australia, causing a heatwave to the nation's interior regions.
Officials have announced fire bans for concern about forest fires.
