Intense winds reaching speeds of approximately 155km/h (96mph) have caused around 90,000 households without power and compelled agencies to cancel over 100 air travel services, as reported by domestic outlets.
The winds are influencing the entire South Island and southern parts of the northern region, according to the weather forecasting body.
New Zealand authorities have issued infrequent red wind warnings - the top caution category - in key areas including these major districts.
Residents have been urged to avoid going outside, stay off roads, and prepare for more utility disruptions.
Extensive Impact and Emergency Measures
The power cut appears to be affecting homes mostly in the South Island, while authorities say that power was being restored progressively.
Local media have indicated that in certain areas roofs have been ripped off houses, while power lines and trees have been brought down by the gusts.
Across Wellington, a man was fatally injured after being hit by a wooden fragment at a frequent walking route on Tuesday.
Meanwhile in Wellington, a individual was swept into oncoming traffic on a road by a strong gust of wind, in a incident that was filmed in a popular vehicle recording.
Flights entering and leaving the metropolis have been cancelled as a result of the winds, while some roads and libraries are also closed.
At the same time local leaders have announced a emergency situation, to assist recovery activities.
Work Stoppages Alongside Harsh Weather
The powerful gales on Thursday coincide with many of teachers, doctors and other public workers are participating in what has been termed a "mega strike", demanding higher wages and enhanced employment terms.
But the severe conditions has compelled them to alter various scheduled activities, with several external protests relocated inside or cancelled.
Comparable winds are impacting the nearby nation, ushering in a heatwave to the remote areas.
Officials have declared burning restrictions for fear of bushfires.