Intense gusts reaching speeds of approximately 155km/h (96mph) have caused nearly 90,000 households without power and compelled officials to halt more than 100 aircraft departures, as reported by regional news sources.
The winds are impacting the entire South Island and southern sections of the northern region, according to the weather forecasting body.
Officials in New Zealand have released uncommon severe gust advisories - the most severe warning - in core zones encompassing Wellington and Canterbury.
Residents have been advised to remain inside, avoid travel, and get ready for additional electricity and network failures.
Extensive Destruction and Emergency Measures
The power cut is primarily influencing homes mainly in the South Island, though authorities say that the electricity supply was being restored progressively.
Regional news have stated that in certain areas roofs have been ripped off houses, whereas utility poles and vegetation have been toppled by the gales.
Across Wellington, a man was fatally injured after being hit by a tree branch at a frequent walking route on earlier this week.
Also in the capital, a woman was blown onto moving cars on a road by a powerful blast, in a event that was filmed in a widely shared car camera footage.
Aircraft services in and out of the city have been halted because of the weather, while certain highways and community centers are not operating.
At the same time local leaders have declared a emergency situation, to support disaster response efforts.
Labor Protests Alongside Harsh Conditions
The wild winds on Thursday occur while many of school staff, physicians and civil servants take part in what has been termed a "mega strike", demanding improved salaries and workplace environments.
However the severe conditions has forced them to modify certain arrangements, with several external protests shifted to interior venues or called off.
Like conditions are also sweeping Australia, ushering in a heatwave to the country's outback.
Officials have announced flame prohibitions for concern about wildfires.
