Intense gusts hitting velocities of as high as 155km/h (96mph) have resulted in nearly 90,000 households lacking electricity and led authorities to cancel over 100 flights, according to domestic outlets.
The gales are impacting the complete southern region and southern parts of the North Island, according to the weather forecasting body.
The nation's agencies have issued uncommon high-level wind alerts - the top caution category - in key areas including Canterbury and Wellington.
People have been encouraged to avoid going outside, stay off roads, and get ready for additional power and communication outages.
Widespread Impact and Emergency Measures
This outage is primarily influencing residences mainly in the southern region, while agencies state that the electricity supply was being restored progressively.
Local media have indicated that in some places structures have suffered roof damage, whereas power lines and trees have been knocked down by the gales.
In Wellington, a man was fatally injured after being hit by a tree branch at a popular trail walking spot on Tuesday.
Also in the capital, a individual was blown onto oncoming traffic on a road by a strong gust of wind, in a incident that was captured in a widely shared car camera footage.
Flights entering and leaving the city have been cancelled as a result of the gusts, while some roads and libraries are shut down.
At the same time authorities in Canterbury have declared a state of emergency, to support recovery activities.
Work Stoppages Amid Extreme Conditions
The powerful gales on today occur while numerous of school staff, physicians and civil servants take part in what has been termed a "mega strike", requesting improved salaries and workplace environments.
But the extreme weather has forced them to modify certain arrangements, with several external protests relocated inside or called off.
Similar gusts are also sweeping the nearby nation, causing a period of extreme heat to the country's outback.
Authorities have issued burning restrictions for apprehension regarding wildfires.
