The Swan Lake Fire has roughly doubled in size to an estimated 6,951 acres and continues to burn in the area of the Kenai National Wildfire Refuge. The Division of Forestry says containment is at 0 percent and the cause of the fire is said to have come from lightning. Officials say the fire sparked on June 5. Wednesday KTUU reported that the Pioneer Peak Hotshots and Gannett Glacier Fire Crew are making their way to the fire. Fire managers with the Alaska Division of Forestry are working with refuge personnel to manage the fire to reduce future wildland fire hazards and enhance wildlife habitat by allowing for fire's natural role to create a diversity of vegetation types and tree age classes, the division writes. Smoke from the fire is visible from the Sterling Highway between mileposts 65 and 75. Motorists are advised to slow down, turn headlights on and use caution driving through the fire area.