Intense gusts hitting speeds of as high as 155km/h (96mph) have resulted in approximately 90,000 homes without power and forced agencies to cancel more than 100 air travel services, based on domestic outlets.
The gales are influencing the entire southern region and lower areas of the North Island, according to the weather forecasting body.
New Zealand authorities have issued infrequent high-level wind alerts - the top caution category - in key areas including these major districts.
People have been urged to stay indoors, avoid travel, and make arrangements for further utility disruptions.
Extensive Destruction and Crisis Measures
This outage is primarily influencing homes mostly in the South Island, although agencies report that energy was being gradually reinstated.
Local media have reported that in certain areas roofs have been ripped off houses, while trees and electricity poles have been brought down by the gusts.
In Wellington, a man was killed after being hit by a falling limb at a well-known hiking path on Tuesday.
Meanwhile in Wellington, a female was swept into oncoming traffic on a street by a intensive burst, in a incident that was filmed in a widely shared car camera footage.
Air travel in and out of the urban area have been cancelled as a result of the gusts, while certain highways and community centers are also closed.
Simultaneously local leaders have announced a state of emergency, to assist recovery activities.
Strike Action Amid Severe Conditions
These intense gusts on this day occur while many of teachers, doctors and other public workers are participating in what has been termed a "major walkout", demanding improved salaries and workplace environments.
However the extreme weather has compelled them to alter some of their plans, with various open-air gatherings relocated inside or called off.
Similar gusts are impacting the nearby nation, ushering in a period of extreme heat to the country's outback.
Authorities have issued fire bans for apprehension regarding bushfires.
