Intense winds hitting speeds of up to 155km/h (96mph) have left approximately 90,000 properties lacking electricity and forced officials to cancel in excess of 100 flights, based on local media.
The winds are impacting the entire South Island and southern sections of the North Island, according to the national weather agency.
Officials in New Zealand have announced rare severe gust advisories - the top caution category - in core zones including Wellington and Canterbury.
Locals have been urged to stay indoors, stay off roads, and prepare for more utility disruptions.
Extensive Destruction and Crisis Measures
The power cut appears to be affecting residences mainly in the southern region, although officials state that power was being gradually reinstated.
Domestic outlets have reported that in various locations structures have suffered roof damage, and trees and electricity poles have been knocked down by the gusts.
Across Wellington, a person was fatally injured after being hit by a falling limb at a popular trail walking spot on earlier this week.
Meanwhile in Wellington, a female was pushed toward oncoming traffic on a road by a intensive burst, in a event that was recorded in a widely shared car camera footage.
Air travel to and from the urban area have been halted due to the winds, whereas some roads and libraries are not operating.
Meanwhile local leaders have declared a state of emergency, to support disaster response efforts.
Labor Protests During Extreme Weather
The powerful gales on today come as many of teachers, doctors and other public workers are participating in what has been described as a "major walkout", requesting better pay and working conditions.
But the severe conditions has compelled them to change some of their plans, with several external protests shifted to interior venues or called off.
Like conditions are also sweeping the neighboring country, ushering in a period of extreme heat to the country's outback.
Agencies have announced fire bans for fear of bushfires.
