Intense winds reaching velocities of as high as 155km/h (96mph) have resulted in approximately 90,000 homes without power and compelled authorities to call off more than 100 flights, as reported by domestic outlets.
The gales are impacting the entire South Island and southern parts of the North Island, according to the country's meteorological service.
The nation's agencies have released infrequent red wind warnings - the highest alert level - in core zones encompassing Canterbury and Wellington.
People have been advised to stay indoors, stay off roads, and make arrangements for more electricity and network failures.
Widespread Impact and Emergency Measures
This outage appears to be affecting households mainly in the South Island, though officials say that power was being gradually reinstated.
Local media have stated that in certain areas structures have suffered roof damage, whereas trees and electricity poles have been toppled by the gales.
In Wellington, a man was fatally injured after being struck by a wooden fragment at a well-known hiking path on earlier this week.
Also in the capital, a individual was pushed toward oncoming traffic on a road by a powerful blast, in a event that was filmed in a viral dashcam video.
Air travel to and from the urban area have been cancelled because of the winds, whereas some roads and libraries are also closed.
Simultaneously local leaders have issued a crisis declaration, to facilitate disaster response efforts.
Strike Action During Harsh Weather
The wild winds on today come as numerous of teachers, doctors and other public workers take part in what has been termed a "mega strike", demanding better pay and working conditions.
However the intense climate has forced them to modify various scheduled activities, with several external protests relocated inside or called off.
Like conditions are impacting the nearby nation, causing a period of extreme heat to the remote areas.
Agencies have announced fire bans for fear of wildfires.
