Severe winds reaching speeds of as high as 155km/h (96mph) have left around 90,000 homes experiencing outages and forced authorities to call off more than 100 aircraft departures, as reported by regional news sources.
The gales are affecting the whole South Island and southern parts of the northern region, according to the national weather agency.
New Zealand authorities have announced rare severe gust advisories - the highest alert level - in key areas such as these major districts.
Residents have been advised to avoid going outside, refrain from journeys, and make arrangements for further power and communication outages.
Broad Destruction and Emergency Measures
The power cut is primarily influencing residences predominantly in the South Island, though authorities say that power was being restored progressively.
Regional news have reported that in some places homes have lost their roofs, and utility poles and vegetation have been toppled by the winds.
In Wellington, a man was killed after being hit by a wooden fragment at a well-known hiking path on earlier this week.
Also in the capital, a female was swept into oncoming traffic on a road by a strong gust of wind, in a event that was captured in a popular vehicle recording.
Flights in and out of the urban area have been suspended due to the gusts, and certain highways and community centers are also closed.
Simultaneously authorities in Canterbury have issued a crisis declaration, to facilitate disaster response efforts.
Strike Action Amid Severe Weather
The wild winds on today coincide with numerous of educators, medical professionals and government employees take part in what has been described as a "significant labor action", requesting better pay and working conditions.
However the severe conditions has forced them to modify certain arrangements, with various open-air gatherings moved indoors or abandoned.
Like conditions are affecting the neighboring country, ushering in a heatwave to the nation's interior regions.
Agencies have announced burning restrictions for concern about wildfires.
