Powerful winds hitting velocities of up to 155km/h (96mph) have resulted in around 90,000 households without power and forced authorities to call off more than 100 flights, according to domestic outlets.
The gales are impacting the whole southern region and lower areas of the North Island, according to the weather forecasting body.
Officials in New Zealand have issued uncommon high-level wind alerts - the most severe warning - in core zones such as Wellington and Canterbury.
People have been encouraged to avoid going outside, avoid travel, and prepare for additional utility disruptions.
Broad Damage and Crisis Response
This outage appears to be affecting residences mostly in the South Island, though authorities report that the electricity supply was being slowly brought back.
Local media have reported that in various locations structures have suffered roof damage, whereas power lines and trees have been knocked down by the gales.
Within the capital, a man was fatally injured after being struck by a tree branch at a frequent walking route on Tuesday.
Meanwhile in Wellington, a female was swept into approaching vehicles on a road by a intensive burst, in a moment that was filmed in a viral dashcam video.
Aircraft services in and out of the metropolis have been suspended due to the weather, whereas various routes and public facilities are also closed.
Simultaneously Canterbury officials have issued a state of emergency, to facilitate disaster response efforts.
Strike Action Amid Extreme Conditions
The wild winds on this day coincide with numerous of educators, medical professionals and government employees take part in what has been described as a "significant labor action", requesting higher wages and enhanced employment terms.
Yet the severe conditions has forced them to alter certain arrangements, with various open-air gatherings relocated inside or cancelled.
Comparable winds are also sweeping the neighboring country, causing a heatwave to the country's outback.
Agencies have issued burning restrictions for apprehension regarding forest fires.
