Severe winds hitting speeds of as high as 155km/h (96mph) have left around 90,000 homes lacking electricity and led agencies to cancel more than 100 aircraft departures, as reported by domestic outlets.
The winds are impacting the complete South Island and lower areas of the North Island, as stated by the country's meteorological service.
Officials in New Zealand have issued rare severe gust advisories - the top caution category - in key areas encompassing these major districts.
Locals have been urged to stay indoors, refrain from journeys, and make arrangements for additional power and communication outages.
Widespread Damage and Emergency Response
The power cut seems to be impacting residences mainly in the South Island, while agencies state that power was being slowly brought back.
Local media have stated that in various locations roofs have been ripped off houses, while power lines and trees have been knocked down by the winds.
Across Wellington, a person was fatally injured after being hit by a tree branch at a frequent walking route on earlier this week.
Meanwhile in Wellington, a individual was blown onto oncoming traffic on a street by a powerful blast, in a moment that was filmed in a viral dashcam video.
Air travel to and from the metropolis have been cancelled as a result of the gusts, while certain highways and community centers are not operating.
Meanwhile Canterbury officials have announced a state of emergency, to assist recovery activities.
Strike Action Alongside Harsh Conditions
The powerful gales on Thursday occur while tens of thousands of educators, medical professionals and government employees take part in what has been called a "mega strike", demanding better pay and working conditions.
But the intense climate has pressured them to alter some of their plans, with several external protests relocated inside or cancelled.
Similar gusts are affecting the neighboring country, bringing a heatwave to the country's outback.
Agencies have declared burning restrictions for fear of forest fires.
