Intense gusts hitting velocities of up to 155km/h (96mph) have left approximately 90,000 homes lacking electricity and forced officials to halt in excess of 100 flights, according to domestic outlets.
The gales are affecting the whole South Island and lower areas of the North Island, per the country's meteorological service.
Officials in New Zealand have announced uncommon high-level wind alerts - the top caution category - in key areas including Wellington and Canterbury.
Residents have been advised to stay indoors, refrain from journeys, and prepare for more power and communication outages.
Broad Damage and Crisis Response
The power cut appears to be affecting households predominantly in the South Island, although officials say that power was being restored progressively.
Local media have indicated that in some places roofs have been ripped off houses, whereas power lines and trees have been toppled by the gales.
In Wellington, a man was lost his life after being struck by a tree branch at a popular trail walking spot on Tuesday.
Meanwhile in Wellington, a individual was pushed toward approaching vehicles on a street by a intensive burst, in a incident that was captured in a viral dashcam video.
Aircraft services entering and leaving the metropolis have been halted as a result of the gusts, while certain highways and community centers are shut down.
At the same time authorities in Canterbury have announced a state of emergency, to assist recovery activities.
Strike Action During Harsh Weather
These intense gusts on today occur while many of teachers, doctors and other public workers are engaged in what has been described as a "major walkout", requesting better pay and working conditions.
Yet the extreme weather has compelled them to change some of their plans, with some outdoor rallies relocated inside or abandoned.
Comparable winds are affecting Australia, bringing a heatwave to the remote areas.
Authorities have declared fire bans for apprehension regarding bushfires.
