Yukon's hot and dry spring continues to foster new fires, with Yukon Wildland Fire Management reporting 23 blazes starting over the weekend.

Firefighters from Ontario are helping Yukon crews as they prioritise their response. Forty-three fires are now active in the territory, more than the 32 fire total for all of last year.

A large fire burning in the Watson Lake district has been causing "light ash" to fall in the community.

Some parts of Yukon are returning to 'moderate' fire risk however conditions remain almost ubiquitously 'extreme'. (Yukon Wildland Fire Management) Authorities say the fire does not immediately threaten buildings, as it is burning 83 kilometres northwest of Watson Lake in a remote area, however they are warning residents there may be smoke and ash in the air.

Smoke may also become visible in Dawson City, depending on wind conditions.

Fire 2km from mining camp

A 300-hectare fire near Scroggie Creek is burning within two kilometres of a mining camp. Firefighters have installed sprinklers to help protect the camp.

A 400-hectare fire continues to burn near the Casino Mine in the Beaver Creek fire district. Officials say a Wildland Fire Management Response Officer is assessing the mine area for structural protection.

A fire burning 30 kilometres east of Lake Laberge continues to grow. Wildland Fire Management says smoke will be visible from the Whitehorse area but says the blaze it not considered to be a risk to people or property.

Firefighters with helicopters are assessing a new fire spotted Monday at kilometre 66 of the Dempster Highway.

Most of this season's fires have been sparked by lightning, however some have been caused by unattended bonfires and even farm equipment.

Anyone who sees a wildfire is urged to call Yukon's wildfire hotline at 1-888-798-FIRE (3473).