Intense gusts hitting speeds of as high as 155km/h (96mph) have caused around 90,000 homes without power and forced agencies to call off over 100 flights, as reported by regional news sources.
The gales are affecting the complete South Island and southern sections of the North Island, according to the country's meteorological service.
Officials in New Zealand have released uncommon severe gust advisories - the highest alert level - in core zones including Wellington and Canterbury.
Locals have been advised to remain inside, refrain from journeys, and make arrangements for additional electricity and network failures.
Extensive Damage and Emergency Response
The electricity loss appears to be affecting households mainly in the southern region, though agencies state that energy was being gradually reinstated.
Regional news have reported that in certain areas homes have lost their roofs, while utility poles and vegetation have been brought down by the gusts.
Across Wellington, a man was lost his life after being hit by a falling limb at a well-known hiking path on earlier this week.
Also in the capital, a female was blown onto oncoming traffic on a thoroughfare by a intensive burst, in a event that was captured in a widely shared car camera footage.
Flights entering and leaving the urban area have been suspended as a result of the gusts, while certain highways and community centers are also closed.
Meanwhile authorities in Canterbury have declared a crisis declaration, to facilitate disaster response efforts.
Labor Protests Alongside Harsh Conditions
The wild winds on Thursday come as many of educators, medical professionals and government employees take part in what has been described as a "significant labor action", requesting improved salaries and workplace environments.
But the severe conditions has compelled them to change certain arrangements, with some outdoor rallies shifted to interior venues or called off.
Similar gusts are impacting the nearby nation, bringing a period of extreme heat to the country's outback.
Authorities have issued flame prohibitions for concern about wildfires.
