Severe winds hitting speeds of approximately 155km/h (96mph) have caused around 90,000 properties experiencing outages and led agencies to call off more than 100 flights, based on domestic outlets.
The gales are influencing the whole southern region and lower areas of the northern region, per the weather forecasting body.
Officials in New Zealand have released infrequent high-level wind alerts - the highest alert level - in core zones encompassing Canterbury and Wellington.
Residents have been encouraged to stay indoors, refrain from journeys, and get ready for further utility disruptions.
Widespread Destruction and Emergency Measures
This outage is primarily influencing homes predominantly in the South Island, while agencies report that the electricity supply was being restored progressively.
Local media have reported that in some places structures have suffered roof damage, and utility poles and vegetation have been knocked down by the gales.
Across Wellington, a man was fatally injured after being struck by a tree branch at a frequent walking route on Tuesday.
Meanwhile in Wellington, a individual was pushed toward approaching vehicles on a street by a strong gust of wind, in a incident that was recorded in a viral dashcam video.
Flights to and from the city have been halted as a result of the weather, and some roads and libraries are shut down.
Meanwhile Canterbury officials have issued a crisis declaration, to support disaster response efforts.
Strike Action During Extreme Conditions
These intense gusts on Thursday occur while many of school staff, physicians and civil servants are engaged in what has been termed a "mega strike", demanding higher wages and enhanced employment terms.
However the extreme weather has forced them to alter certain arrangements, with various open-air gatherings relocated inside or cancelled.
Like conditions are affecting the neighboring country, causing a high-temperature event to the remote areas.
Authorities have announced fire bans for apprehension regarding bushfires.
