Severe winds hitting speeds of up to 155km/h (96mph) have caused approximately 90,000 homes without power and forced authorities to halt more than 100 flights, based on regional news sources.
The winds are impacting the whole southern region and southern parts of the northern region, according to the weather forecasting body.
New Zealand authorities have issued rare high-level wind alerts - the top caution category - in key areas including Wellington and Canterbury.
People have been encouraged to remain inside, stay off roads, and prepare for further power and communication outages.
Widespread Destruction and Crisis Measures
The electricity loss is primarily influencing residences mainly in the South Island, though authorities report that the electricity supply was being gradually reinstated.
Domestic outlets have reported that in some places structures have suffered roof damage, whereas power lines and trees have been brought down by the gales.
In Wellington, a individual was fatally injured after being hit by a wooden fragment at a well-known hiking path on earlier this week.
Also in the capital, a female was blown onto moving cars on a street by a strong gust of wind, in a moment that was captured in a popular vehicle recording.
Aircraft services to and from the city have been cancelled due to the weather, while various routes and public facilities are shut down.
Meanwhile Canterbury officials have declared a emergency situation, to facilitate disaster response efforts.
Labor Protests Alongside Harsh Conditions
The wild winds on Thursday occur while numerous of educators, medical professionals and government employees take part in what has been termed a "significant labor action", demanding higher wages and enhanced employment terms.
Yet the intense climate has forced them to alter various scheduled activities, with some outdoor rallies shifted to interior venues or abandoned.
Similar gusts are impacting Australia, causing a period of extreme heat to the remote areas.
Officials have announced burning restrictions for apprehension regarding bushfires.
