Heavy rain on B.C.'s North Coast has triggered mudslides and flooding, closing several routes and cutting off two remote communities on Wednesday morning.

The communities of Stewart and Kincolith, located northwest of Prince George, are only accessible by sea after routes in the area were closed.

Highway 37 was closed in both directions 21 kilometres south of the Bob Quinn Lake maintenance yard because of flooding and mudslides. Highway 37A was also closed at Meziadin Junction east of Stewart because of flooding in the area.

A mudslide also closed the Nisga'a Highway in both directions between Greenville and Kincolith. There were no detours in place and no word on when those routes may re-open.

Outside of Prince Rupert on Highway 16, there was single alternating traffic at Rainbow Pass due to flooding and on Haida Gwaii there was water on Highway 16 just outside of Skidegate due to flooding.

More rain on the way

Peter Weeber, the chief administrative officer for the District of Stewart said all roads into town are cut off, two bridges are washed out and the airport is closed due to flooding.

Officials are hoping to fly over the affected highway on Wednesday morning to see if anyone has been trapped on the road. Weeber said nobody has been reported missing and officials don't believe anyone has been caught in a mudslide reported in the area.

Some campgrounds in Stewart have also been evacuated because of flooding and more rain is on the way according to Environment Canada.

On Wednesday morning Environment Canada issued a rainfall warning for the north coast and inland areas around Stewart, forecasting that an additional 70 millimetres could fall by Thursday morning.