Powerful winds attaining speeds of approximately 155km/h (96mph) have left nearly 90,000 properties without power and led agencies to call off more than 100 air travel services, according to local media.
The gales are affecting the whole South Island and lower areas of the northern region, according to the weather forecasting body.
New Zealand authorities have announced uncommon severe gust advisories - the most severe warning - in key areas including Wellington and Canterbury.
Residents have been advised to stay indoors, avoid travel, and make arrangements for additional utility disruptions.
Broad Impact and Crisis Measures
The power cut seems to be impacting residences predominantly in the southern region, though officials report that power was being gradually reinstated.
Local media have stated that in certain areas structures have suffered roof damage, while power lines and trees have been knocked down by the gales.
Across Wellington, a person was killed after being struck by a tree branch at a well-known hiking path on earlier this week.
Meanwhile in Wellington, a female was pushed toward oncoming traffic on a road by a powerful blast, in a incident that was recorded in a popular vehicle recording.
Aircraft services to and from the metropolis have been cancelled because of the gusts, and various routes and public facilities are not operating.
At the same time Canterbury officials have declared a emergency situation, to facilitate disaster response efforts.
Work Stoppages During Harsh Weather
These intense gusts on today occur while many of school staff, physicians and civil servants are participating in what has been described as a "significant labor action", calling for improved salaries and workplace environments.
But the severe conditions has pressured them to change various scheduled activities, with some outdoor rallies shifted to interior venues or cancelled.
Like conditions are also sweeping the neighboring country, bringing a heatwave to the remote areas.
Officials have issued flame prohibitions for concern about wildfires.
