Powerful gusts reaching velocities of up to 155km/h (96mph) have caused nearly 90,000 properties lacking electricity and led agencies to cancel in excess of 100 aircraft departures, as reported by domestic outlets.
The winds are influencing the whole South Island and southern sections of the northern region, according to the weather forecasting body.
Officials in New Zealand have issued rare severe gust advisories - the top caution category - in core zones encompassing these major districts.
Residents have been advised to avoid going outside, avoid travel, and get ready for additional power and communication outages.
Broad Impact and Emergency Measures
The power cut appears to be affecting households predominantly in the southern region, while authorities report that energy was being restored progressively.
Regional news have indicated that in various locations structures have suffered roof damage, and utility poles and vegetation have been knocked down by the gusts.
Within the capital, a man was killed after being hit by a wooden fragment at a frequent walking route on Tuesday.
Meanwhile in Wellington, a female was swept into oncoming traffic on a street by a powerful blast, in a incident that was recorded in a widely shared car camera footage.
Aircraft services entering and leaving the urban area have been cancelled as a result of the weather, while some roads and libraries are not operating.
Meanwhile Canterbury officials have declared a emergency situation, to assist emergency management operations.
Work Stoppages Alongside Extreme Conditions
The powerful gales on Thursday occur while numerous of educators, medical professionals and government employees are engaged in what has been described as a "major walkout", demanding better pay and working conditions.
Yet the intense climate has compelled them to modify some of their plans, with various open-air gatherings relocated inside or cancelled.
Comparable winds are also sweeping the nearby nation, bringing a high-temperature event to the remote areas.
Officials have issued fire bans for fear of wildfires.
