The Douglas Forest Protective Association responded to two vehicle fires within two days.
Thursday morning, a vehicle caught fire near Azalea on Interstate 5.
Kyle Reed with the DFPA said the fire spread to the grass and burned one tenth of an acre.
The Azalea Rural Fire Protection District, Glendale Fire Department and the Canyonville-South Umpqua Fire District responded to help put out the vehicle fire.
On Wednesday, one lane on Interstate 5 south of Rice Hill closed after a car and a motorhome caught fire and spread to nearby grass just before 2 p.m.
Firefighters with DFPA and North Douglas County Fire and EMS extinguished the grass fire and mopped up hot spots.
By 3 p.m., the Oregon Department of Transportation re-opened both lanes.
No injuries were reported for either vehicle fire.
Later on Wednesday, DFPA firefighters responded to another fire burning off of Highway 38, northwest of Elkton.
A DFPA engine arrived on scene to find a fast-moving grass fire that was moving up a hill towards brush and trees.
Multiple engines from both the DFPA and the Elkton Rural Fire Department created a perimeter around the fire while a helicopter dropped buckets of water onto the flames.
By 7 p.m., crews reported the spread of the fire had been stopped, but they remained on scene until midnight, securing the area.
A preliminary investigation indicated the fire might have been caused by a power line.