Severe gales hitting speeds of up to 155km/h (96mph) have left around 90,000 properties experiencing outages and compelled officials to cancel in excess of 100 air travel services, as reported by regional news sources.
These gusts are impacting the entire South Island and southern parts of the northern region, according to the weather forecasting body.
Officials in New Zealand have issued rare high-level wind alerts - the top caution category - in central regions encompassing Wellington and Canterbury.
Locals have been advised to stay indoors, avoid travel, and prepare for further utility disruptions.
Extensive Damage and Emergency Response
The power cut seems to be impacting homes mostly in the southern region, although authorities report that power was being restored progressively.
Domestic outlets have stated that in certain areas homes have lost their roofs, and power lines and trees have been toppled by the gusts.
In Wellington, a person was killed after being impacted by a falling limb at a popular trail walking spot on Tuesday.
Also in the capital, a woman was swept into approaching vehicles on a street by a powerful blast, in a incident that was filmed in a viral dashcam video.
Aircraft services in and out of the urban area have been halted because of the winds, while various routes and public facilities are not operating.
Meanwhile authorities in Canterbury have announced a emergency situation, to support recovery activities.
Labor Protests During Harsh Conditions
The powerful gales on Thursday coincide with numerous of teachers, doctors and other public workers take part in what has been described as a "mega strike", demanding higher wages and enhanced employment terms.
But the severe conditions has pressured them to change some of their plans, with various open-air gatherings shifted to interior venues or called off.
Similar gusts are also sweeping Australia, bringing a period of extreme heat to the nation's interior regions.
Authorities have issued flame prohibitions for fear of bushfires.
