Severe winds attaining velocities of up to 155km/h (96mph) have resulted in around 90,000 homes lacking electricity and led officials to halt more than 100 aircraft departures, according to regional news sources.
The gales are affecting the whole South Island and southern parts of the northern region, as stated by the country's meteorological service.
Officials in New Zealand have announced uncommon high-level wind alerts - the most severe warning - in key areas including Canterbury and Wellington.
Residents have been encouraged to avoid going outside, stay off roads, and prepare for more power and communication outages.
Extensive Destruction and Emergency Response
The electricity loss seems to be impacting households mainly in the southern region, although officials report that energy was being gradually reinstated.
Domestic outlets have reported that in certain areas roofs have been ripped off houses, whereas utility poles and vegetation have been knocked down by the winds.
In Wellington, a person was fatally injured after being struck by a falling limb at a frequent walking route on Tuesday.
Meanwhile in Wellington, a individual was blown onto oncoming traffic on a thoroughfare by a strong gust of wind, in a moment that was filmed in a viral dashcam video.
Flights in and out of the metropolis have been halted because of the weather, whereas certain highways and community centers are shut down.
Meanwhile Canterbury officials have issued a crisis declaration, to support recovery activities.
Strike Action Amid Severe Weather
The powerful gales on Thursday occur while many of educators, medical professionals and government employees take part in what has been described as a "significant labor action", demanding improved salaries and workplace environments.
Yet the extreme weather has forced them to modify some of their plans, with various open-air gatherings relocated inside or called off.
Similar gusts are affecting the nearby nation, ushering in a heatwave to the nation's interior regions.
Officials have issued flame prohibitions for apprehension regarding wildfires.