Intense gusts reaching velocities of as high as 155km/h (96mph) have caused approximately 90,000 households experiencing outages and compelled authorities to cancel over 100 air travel services, according to domestic outlets.
The winds are affecting the whole southern region and lower areas of the North Island, according to the country's meteorological service.
New Zealand authorities have issued rare red wind warnings - the highest alert level - in key areas including these major districts.
Residents have been urged to stay indoors, refrain from journeys, and get ready for further electricity and network failures.
Extensive Damage and Emergency Response
The electricity loss seems to be impacting homes predominantly in the South Island, though authorities report that the electricity supply was being restored progressively.
Regional news have reported that in various locations roofs have been ripped off houses, whereas utility poles and vegetation have been knocked down by the gusts.
Within the capital, a man was fatally injured after being impacted by a tree branch at a well-known hiking path on Tuesday.
Also in the capital, a woman was swept into approaching vehicles on a street by a powerful blast, in a moment that was captured in a widely shared car camera footage.
Air travel entering and leaving the urban area have been suspended due to the gusts, whereas certain highways and community centers are also closed.
At the same time Canterbury officials have issued a crisis declaration, to assist emergency management operations.
Strike Action During Severe Weather
The powerful gales on today occur while tens of thousands of teachers, doctors and other public workers are participating in what has been termed a "mega strike", demanding higher wages and enhanced employment terms.
But the extreme weather has compelled them to alter some of their plans, with some outdoor rallies moved indoors or abandoned.
Similar gusts are impacting the neighboring country, bringing a high-temperature event to the remote areas.
Officials have issued burning restrictions for concern about wildfires.
