Firefighters are returning today to battle a blaze 55 kilometres north of Whitehorse, near Lake Laberge.

 "It's not posing any threat right now to any values," said Yukon Wildland Fire official George Maratos.

"But it is highly visible given its location, very visible from the community of Lake Laberge, from the campground and surrounding areas."

Forest fire monitors first noticed the 20-hectare wildfire Wednesday evening.

Firefighters, air tankers and several helicopters were sent in last night in an attempt to bring it under control.

The cause of the fire is unknown at this time.

Twenty-one firefighters and three senior staff from British Columbia will be arriving in Whitehorse today to help battle forest fires in the Yukon.

Fires burning in the Mayo and Dawson districts are expected to have grown substantially due to dry and windy conditions.

Yukon Wildland Fire Management officials are also in regular communication with their counterparts in Alaska for updates on a large fire 30 kilometres from Beaver Creek.

The fire is not threatening the community but smoke from the blaze has been blowing into town.