Intense gusts hitting speeds of as high as 155km/h (96mph) have resulted in approximately 90,000 homes lacking electricity and compelled authorities to halt more than 100 flights, as reported by local media.
The gales are impacting the whole South Island and southern sections of the North Island, per the national weather agency.
Officials in New Zealand have issued rare high-level wind alerts - the top caution category - in central regions including these major districts.
Residents have been urged to avoid going outside, refrain from journeys, and make arrangements for further electricity and network failures.
Widespread Destruction and Emergency Measures
This outage appears to be affecting households mostly in the southern region, although agencies say that the electricity supply was being restored progressively.
Regional news have indicated that in various locations roofs have been ripped off houses, whereas trees and electricity poles have been knocked down by the winds.
In Wellington, a person was killed after being hit by a tree branch at a well-known hiking path on earlier this week.
Also in the capital, a female was pushed toward oncoming traffic on a thoroughfare by a intensive burst, in a incident that was recorded in a viral dashcam video.
Flights to and from the city have been suspended because of the gusts, whereas various routes and public facilities are not operating.
At the same time local leaders have announced a crisis declaration, to support disaster response efforts.
Labor Protests Alongside Harsh Weather
The powerful gales on Thursday occur while tens of thousands of teachers, doctors and other public workers take part in what has been described as a "mega strike", requesting better pay and working conditions.
But the severe conditions has pressured them to change various scheduled activities, with some outdoor rallies relocated inside or called off.
Similar gusts are also sweeping the neighboring country, causing a heatwave to the country's outback.
Authorities have announced fire bans for apprehension regarding bushfires.
