Cyclone Cook: Bay of Islands waterfall turned to furious river

Cyclone Cook has turned a normally tranquil waterfall in the Bay of Islands into a raging torrent.

The storm is expected to bring its full force to New Zealand, but its effects have already been felt in the north.

Paihia resident Clint Wagener filmed the normally placid Haruru Falls near the area's main tourist town as it was swamped with water.

Haruru Falls on a normal day (Anna-Lena Geis / Twitter)
Haruru Falls on a normal day (Anna-Lena Geis / Twitter)

The town itself has already started sandbagging in preparation for more rain.

The rain has already made its presence felt in the top of the North Island, with flooding near Kaeo closing State Highway 10 as well as SH1.

One lane has since been opened on SH1 south of Kaitaia. 

The Far North had been completely cut off after a big slip came down in the Mangamuka Gorge.