Highway 16 on Haida Gwaii is closed in both directions near Port Clements.
The BC transportation ministry says a tree fell down across the road overnight.
Crews are making assessments and updates are expected later this morning.
Check Drive BC for updates.
Haida Gwaii remains under a wind warning from Environment Canada with gusts of up to 110 kilometres per hour possible.
BC Ferries has cancelled sailings between Skidegate and Alliford Bay due to severe weather.