Intense winds hitting speeds of approximately 155km/h (96mph) have left around 90,000 homes lacking electricity and led officials to cancel more than 100 air travel services, according to domestic outlets.
The gales are influencing the complete southern region and southern sections of the North Island, according to the country's meteorological service.
Officials in New Zealand have announced uncommon severe gust advisories - the highest alert level - in key areas including Wellington and Canterbury.
People have been urged to remain inside, stay off roads, and prepare for further electricity and network failures.
Widespread Damage and Crisis Response
The electricity loss appears to be affecting homes mainly in the South Island, although authorities report that power was being slowly brought back.
Local media have reported that in some places structures have suffered roof damage, while utility poles and vegetation have been knocked down by the gales.
Within the capital, a individual was fatally injured after being struck by a wooden fragment at a well-known hiking path on Tuesday.
Meanwhile in Wellington, a female was swept into moving cars on a road by a powerful blast, in a event that was captured in a popular vehicle recording.
Aircraft services in and out of the metropolis have been cancelled as a result of the weather, while some roads and libraries are also closed.
Simultaneously local leaders have issued a state of emergency, to assist emergency management operations.
Strike Action Amid Severe Conditions
The powerful gales on today come as numerous of teachers, doctors and other public workers are engaged in what has been termed a "major walkout", calling for better pay and working conditions.
However the extreme weather has forced them to modify various scheduled activities, with various open-air gatherings shifted to interior venues or called off.
Like conditions are also sweeping the nearby nation, causing a high-temperature event to the country's outback.
Authorities have issued fire bans for fear of forest fires.
