Weather: Footage shows dramatic helicopter rescue from Fiordland's McKerrow Hut

Footage shows a helicopter pilot making a dramatic rescue as tourists remain stranded following significant torrential rain in the Fiordland region.

The video shows four trampers being scoop netted out of McKerrow Hut in Fiordland's National Park.

"Evacuations are continuing during a weather break for people stuck on tracks in Fiordland," Emergency Management Southland (EMS) said on Facebook. "Meanwhile, roads are closed throughout Southland and rivers are rising."

Eight helicopters are ferrying a constant stream of trampers from huts in Fiordland to Te Anau and Queenstown.

But 195 tourists stranded in Milford Sound will have to stay another night due to the treacherous conditions.

More than a metre of rain has fallen in Milford Sound - which is under a state of emergency.

In two and a half days it's had the amount of rain Wellington would get in a whole year.

Conditions are expected to ease in the region as the day goes on and the rain is now moving on to Westland.