Severe winds reaching velocities of approximately 155km/h (96mph) have left nearly 90,000 properties experiencing outages and led agencies to cancel more than 100 air travel services, as reported by local media.
The winds are affecting the whole South Island and lower areas of the northern region, according to the weather forecasting body.
New Zealand authorities have announced uncommon severe gust advisories - the top caution category - in central regions encompassing Canterbury and Wellington.
Residents have been encouraged to avoid going outside, stay off roads, and make arrangements for further utility disruptions.
Broad Damage and Crisis Response
The electricity loss is primarily influencing households mainly in the South Island, although authorities say that the electricity supply was being restored progressively.
Regional news have indicated that in certain areas homes have lost their roofs, while trees and electricity poles have been brought down by the gales.
In Wellington, a man was fatally injured after being hit by a wooden fragment at a frequent walking route on Tuesday.
Additionally in the city, a individual was pushed toward oncoming traffic on a street by a intensive burst, in a moment that was captured in a popular vehicle recording.
Air travel to and from the city have been halted due to the weather, whereas some roads and libraries are not operating.
Meanwhile Canterbury officials have declared a crisis declaration, to assist recovery activities.
Labor Protests During Extreme Conditions
The powerful gales on today come as numerous of school staff, physicians and civil servants take part in what has been termed a "mega strike", calling for higher wages and enhanced employment terms.
Yet the intense climate has pressured them to alter various scheduled activities, with some outdoor rallies moved indoors or called off.
Comparable winds are affecting the nearby nation, causing a high-temperature event to the nation's interior regions.
Authorities have issued fire bans for fear of bushfires.