Powerful winds hitting velocities of up to 155km/h (96mph) have caused nearly 90,000 properties experiencing outages and led agencies to call off over 100 flights, according to local media.
The winds are affecting the whole southern region and southern parts of the North Island, according to the country's meteorological service.
Officials in New Zealand have issued infrequent severe gust advisories - the top caution category - in core zones encompassing Wellington and Canterbury.
Residents have been advised to remain inside, avoid travel, and get ready for additional utility disruptions.
Extensive Damage and Emergency Measures
The power cut seems to be impacting homes mainly in the southern region, though officials state that the electricity supply was being restored progressively.
Local media have reported that in some places homes have lost their roofs, and power lines and trees have been brought down by the winds.
Across Wellington, a man was fatally injured after being hit by a falling limb at a well-known hiking path on Tuesday.
Meanwhile in Wellington, a female was blown onto oncoming traffic on a street by a powerful blast, in a event that was filmed in a popular vehicle recording.
Air travel entering and leaving the urban area have been cancelled because of the winds, whereas various routes and public facilities are not operating.
Meanwhile authorities in Canterbury have declared a state of emergency, to facilitate recovery activities.
Labor Protests During Severe Conditions
The wild winds on today come as tens of thousands of educators, medical professionals and government employees are engaged in what has been called a "major walkout", demanding improved salaries and workplace environments.
Yet the severe conditions has forced them to alter various scheduled activities, with some outdoor rallies relocated inside or cancelled.
Comparable winds are affecting Australia, causing a high-temperature event to the remote areas.
Agencies have announced fire bans for concern about wildfires.
