The Shellrock Fire burning north of Helena remains at 300 acres while the 467 Trail Fire southeast of Lincoln grew by about 10 acres.
Firefighters planned a burn operation on Tuesday due to the favorable weather conditions.
Fire officials warn that Lewis and Clark County is on the cusp of needing Stage I fire restrictions after an active fire weekend.
Montana DNRC said current firefighting resources are stretched thin across not only Montana, but the nation.
The Shellrock fire north of Helena could threaten structures while the 467 Trail fire south of Lincoln is 60 percent contained.
Part of the west side of Glacier National Park is being evacuated due to a wildfire.
The area is under a red flag warning for increased winds and high temperatures.
The air quality in and around Great Falls as of 10 a.m. on Sunday is rated "orange," which means "Unhealthy for Sensitive Groups."
At least three new fires have been reported in central Montana following storms on Saturday afternoon.
Emergency crews responded to a wildfire along I-15 near the Airport exit on Friday evening.
Officials believe the fire was sparked by a dry lightning strike.