Severe winds reaching velocities of approximately 155km/h (96mph) have caused around 90,000 properties lacking electricity and led agencies to halt over 100 flights, according to local media.
The winds are impacting the whole southern region and southern parts of the North Island, according to the country's meteorological service.
The nation's agencies have released infrequent severe gust advisories - the top caution category - in key areas such as Wellington and Canterbury.
People have been urged to remain inside, avoid travel, and prepare for further utility disruptions.
Extensive Destruction and Emergency Measures
The power cut appears to be affecting residences predominantly in the southern region, while authorities say that the electricity supply was being gradually reinstated.
Domestic outlets have stated that in some places structures have suffered roof damage, and power lines and trees have been knocked down by the winds.
Within the capital, a man was fatally injured after being hit by a falling limb at a popular trail walking spot on Tuesday.
Meanwhile in Wellington, a woman was pushed toward oncoming traffic on a street by a strong gust of wind, in a event that was captured in a widely shared car camera footage.
Air travel in and out of the metropolis have been halted as a result of the weather, and various routes and public facilities are not operating.
Meanwhile Canterbury officials have declared a state of emergency, to facilitate emergency management operations.
Labor Protests Alongside Severe Conditions
The wild winds on today come as numerous of educators, medical professionals and government employees are engaged in what has been termed a "mega strike", requesting improved salaries and workplace environments.
But the severe conditions has forced them to alter certain arrangements, with several external protests shifted to interior venues or cancelled.
Comparable winds are affecting the nearby nation, causing a period of extreme heat to the nation's interior regions.
Authorities have declared fire bans for fear of wildfires.
