Powerful gales reaching speeds of approximately 155km/h (96mph) have caused approximately 90,000 households without power and forced agencies to halt over 100 air travel services, based on domestic outlets.
The gales are affecting the whole South Island and lower areas of the northern region, according to the weather forecasting body.
New Zealand authorities have released rare high-level wind alerts - the top caution category - in core zones including Canterbury and Wellington.
Locals have been advised to stay indoors, stay off roads, and get ready for additional utility disruptions.
Widespread Impact and Crisis Measures
The power cut is primarily influencing households predominantly in the South Island, though officials state that power was being gradually reinstated.
Local media have indicated that in certain areas roofs have been ripped off houses, while utility poles and vegetation have been brought down by the winds.
Within the capital, a man was killed after being impacted by a falling limb at a frequent walking route on Tuesday.
Also in the capital, a woman was swept into oncoming traffic on a thoroughfare by a strong gust of wind, in a incident that was recorded in a viral dashcam video.
Flights to and from the city have been halted as a result of the winds, whereas certain highways and community centers are shut down.
At the same time local leaders have declared a emergency situation, to facilitate emergency management operations.
Strike Action During Extreme Conditions
The powerful gales on this day coincide with tens of thousands of school staff, physicians and civil servants are participating in what has been termed a "significant labor action", requesting higher wages and enhanced employment terms.
However the severe conditions has forced them to change various scheduled activities, with some outdoor rallies moved indoors or called off.
Similar gusts are affecting Australia, causing a heatwave to the nation's interior regions.
Authorities have announced fire bans for apprehension regarding forest fires.
