Intense winds hitting velocities of up to 155km/h (96mph) have resulted in nearly 90,000 homes experiencing outages and led agencies to halt over 100 air travel services, according to domestic outlets.
The winds are impacting the complete South Island and southern parts of the northern region, according to the country's meteorological service.
Officials in New Zealand have issued uncommon red wind warnings - the most severe warning - in central regions including Wellington and Canterbury.
People have been advised to remain inside, refrain from journeys, and make arrangements for further utility disruptions.
Extensive Destruction and Crisis Measures
The electricity loss seems to be impacting homes mainly in the South Island, though authorities report that energy was being gradually reinstated.
Local media have indicated that in certain areas structures have suffered roof damage, and power lines and trees have been toppled by the gusts.
Within the capital, a person was killed after being impacted by a falling limb at a popular trail walking spot on earlier this week.
Also in the capital, a female was swept into oncoming traffic on a thoroughfare by a powerful blast, in a moment that was captured in a popular vehicle recording.
Flights to and from the city have been halted due to the gusts, whereas various routes and public facilities are also closed.
Simultaneously authorities in Canterbury have announced a state of emergency, to support emergency management operations.
Labor Protests Alongside Harsh Conditions
The powerful gales on this day come as many of educators, medical professionals and government employees are engaged in what has been described as a "mega strike", demanding improved salaries and workplace environments.
However the extreme weather has forced them to change some of their plans, with several external protests relocated inside or cancelled.
Similar gusts are affecting Australia, causing a period of extreme heat to the nation's interior regions.
Officials have declared fire bans for fear of wildfires.
