Severe winds hitting velocities of as high as 155km/h (96mph) have caused around 90,000 properties lacking electricity and led agencies to halt over 100 flights, based on domestic outlets.
These gusts are influencing the entire southern region and southern parts of the North Island, according to the national weather agency.
The nation's agencies have released infrequent severe gust advisories - the highest alert level - in key areas including these major districts.
People have been urged to avoid going outside, refrain from journeys, and prepare for further power and communication outages.
Extensive Destruction and Emergency Response
This outage appears to be affecting homes mainly in the South Island, though agencies report that power was being restored progressively.
Local media have stated that in some places homes have lost their roofs, whereas utility poles and vegetation have been knocked down by the winds.
In Wellington, a individual was killed after being struck by a tree branch at a popular trail walking spot on earlier this week.
Also in the capital, a female was swept into moving cars on a road by a strong gust of wind, in a moment that was filmed in a popular vehicle recording.
Flights entering and leaving the city have been halted as a result of the gusts, whereas various routes and public facilities are shut down.
At the same time local leaders have issued a state of emergency, to support emergency management operations.
Labor Protests Alongside Harsh Conditions
These intense gusts on Thursday coincide with tens of thousands of educators, medical professionals and government employees take part in what has been termed a "significant labor action", requesting better pay and working conditions.
Yet the extreme weather has compelled them to alter certain arrangements, with several external protests relocated inside or abandoned.
Similar gusts are also sweeping Australia, ushering in a heatwave to the country's outback.
Officials have announced burning restrictions for fear of bushfires.
