Severe gusts attaining speeds of up to 155km/h (96mph) have left approximately 90,000 properties without power and led authorities to cancel more than 100 air travel services, based on regional news sources.
The gales are influencing the whole South Island and southern parts of the North Island, as stated by the weather forecasting body.
The nation's agencies have announced uncommon severe gust advisories - the highest alert level - in central regions including Canterbury and Wellington.
Locals have been urged to remain inside, stay off roads, and prepare for further utility disruptions.
Widespread Destruction and Crisis Measures
This outage appears to be affecting residences predominantly in the southern region, while officials say that the electricity supply was being gradually reinstated.
Local media have stated that in various locations structures have suffered roof damage, while power lines and trees have been brought down by the gales.
Within the capital, a individual was fatally injured after being hit by a falling limb at a popular trail walking spot on earlier this week.
Meanwhile in Wellington, a individual was blown onto oncoming traffic on a thoroughfare by a powerful blast, in a incident that was captured in a viral dashcam video.
Aircraft services entering and leaving the city have been suspended as a result of the gusts, while some roads and libraries are also closed.
At the same time local leaders have declared a state of emergency, to support emergency management operations.
Strike Action Amid Harsh Conditions
The wild winds on Thursday come as tens of thousands of teachers, doctors and other public workers take part in what has been called a "major walkout", demanding improved salaries and workplace environments.
Yet the intense climate has pressured them to alter various scheduled activities, with several external protests shifted to interior venues or abandoned.
Like conditions are impacting the neighboring country, ushering in a period of extreme heat to the remote areas.
Authorities have declared flame prohibitions for fear of wildfires.
