Intense winds reaching speeds of up to 155km/h (96mph) have resulted in approximately 90,000 homes experiencing outages and forced officials to cancel in excess of 100 flights, as reported by domestic outlets.
These gusts are affecting the whole South Island and southern parts of the North Island, as stated by the weather forecasting body.
The nation's agencies have released rare severe gust advisories - the highest alert level - in central regions such as these major districts.
Residents have been encouraged to stay indoors, refrain from journeys, and prepare for more power and communication outages.
Broad Damage and Crisis Response
The electricity loss appears to be affecting residences mainly in the South Island, though agencies state that the electricity supply was being restored progressively.
Local media have stated that in some places structures have suffered roof damage, and utility poles and vegetation have been brought down by the gales.
Across Wellington, a individual was lost his life after being hit by a tree branch at a well-known hiking path on Tuesday.
Also in the capital, a woman was blown onto oncoming traffic on a thoroughfare by a strong gust of wind, in a moment that was filmed in a viral dashcam video.
Air travel entering and leaving the urban area have been suspended due to the gusts, and certain highways and community centers are not operating.
At the same time authorities in Canterbury have announced a crisis declaration, to assist recovery activities.
Labor Protests Amid Extreme Conditions
These intense gusts on Thursday coincide with numerous of school staff, physicians and civil servants are participating in what has been termed a "major walkout", calling for higher wages and enhanced employment terms.
But the severe conditions has compelled them to modify various scheduled activities, with various open-air gatherings moved indoors or called off.
Similar gusts are impacting the nearby nation, ushering in a period of extreme heat to the remote areas.
Authorities have announced flame prohibitions for apprehension regarding forest fires.