Intense gales hitting velocities of up to 155km/h (96mph) have resulted in approximately 90,000 households without power and led agencies to cancel in excess of 100 flights, based on domestic outlets.
The gales are affecting the whole South Island and southern sections of the northern region, per the weather forecasting body.
New Zealand authorities have released uncommon high-level wind alerts - the top caution category - in central regions encompassing these major districts.
People have been advised to stay indoors, avoid travel, and prepare for further utility disruptions.
Extensive Destruction and Emergency Response
This outage seems to be impacting households mainly in the southern region, while authorities say that power was being restored progressively.
Regional news have indicated that in various locations homes have lost their roofs, whereas trees and electricity poles have been toppled by the gales.
In Wellington, a man was lost his life after being struck by a falling limb at a popular trail walking spot on Tuesday.
Meanwhile in Wellington, a woman was pushed toward oncoming traffic on a thoroughfare by a powerful blast, in a moment that was filmed in a popular vehicle recording.
Flights entering and leaving the metropolis have been halted due to the gusts, whereas various routes and public facilities are shut down.
Meanwhile local leaders have declared a state of emergency, to facilitate emergency management operations.
Labor Protests During Severe Conditions
The powerful gales on Thursday come as tens of thousands of school staff, physicians and civil servants are participating in what has been termed a "significant labor action", demanding improved salaries and workplace environments.
However the intense climate has compelled them to alter some of their plans, with various open-air gatherings moved indoors or called off.
Similar gusts are also sweeping the nearby nation, causing a period of extreme heat to the country's outback.
Authorities have issued fire bans for concern about wildfires.