Seven wildfires continued to burn Sunday in Quetico Provincial Park in Canada. Some have the potential to spread into the Boundary Waters Canoe Area Wilderness and have prompted closures in that area.

Fire managers have identified three fires with the potential to spread across the border, according to a news release from Superior National Forest officials. Officials in the U.S. and Canada have been having ongoing discussions to battle the blazes and secure public safety. A first round of closures in the area was announced on Thursday. The closure area expanded on Saturday to include additional entry points, portages, lakes, rivers and campsites that feed into areas where the fires could threaten public safety.

RELATED: Wildfires force more boundary waters closures along US-Canada border

A group of 14 personnel from the Superior National Forest and Eastern Area Incident Management Team traveled to the Curtain Falls area Saturday to scout the area for public safety concerns and develop a plan to apply direct or indirect suppression tactics. A recon flight revealed an increase in fire behavior, despite lighter winds.

Daily monitoring flights continued on Sunday while personnel developed further plans.

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Delta Lake Fire 10% contained

The Delta Lake Fire, 19 miles east of Ely, continues to be the only active fire within the West Zone complex. It is burning predominantly on private and national forest system lands adjacent to the BWCAW in a dense blowdown area, which hampers firefighting efforts.

Fire behavior was minimal Saturday, due to a localized area of smoke that settled in. As of midday Sunday, the fire was completely wrapped. The fire is considered 10% contained and 62 acres in size.

Mop-up operations are continuing on Sunday, as crews use water to cool and reinforce the containment line. Air resources will continue to drop water as needed on hot spots.