Intense winds hitting velocities of up to 155km/h (96mph) have caused around 90,000 properties lacking electricity and compelled officials to cancel in excess of 100 aircraft departures, according to regional news sources.
The gales are impacting the whole southern region and lower areas of the North Island, according to the weather forecasting body.
New Zealand authorities have issued rare severe gust advisories - the top caution category - in key areas such as Canterbury and Wellington.
People have been advised to stay indoors, refrain from journeys, and prepare for more electricity and network failures.
Broad Impact and Crisis Response
The electricity loss appears to be affecting households mostly in the South Island, though authorities state that the electricity supply was being restored progressively.
Domestic outlets have reported that in various locations homes have lost their roofs, and utility poles and vegetation have been brought down by the winds.
Across Wellington, a individual was lost his life after being struck by a tree branch at a popular trail walking spot on Tuesday.
Also in the capital, a female was blown onto oncoming traffic on a thoroughfare by a powerful blast, in a incident that was captured in a popular vehicle recording.
Aircraft services entering and leaving the urban area have been halted due to the winds, and various routes and public facilities are shut down.
At the same time Canterbury officials have announced a state of emergency, to support disaster response efforts.
Work Stoppages Alongside Severe Conditions
The wild winds on this day coincide with numerous of educators, medical professionals and government employees take part in what has been called a "mega strike", calling for higher wages and enhanced employment terms.
But the severe conditions has forced them to change certain arrangements, with various open-air gatherings shifted to interior venues or abandoned.
Like conditions are also sweeping the nearby nation, ushering in a high-temperature event to the country's outback.
Agencies have issued burning restrictions for fear of bushfires.
