The Air Park fire has burned about 514 acres southwest of the Animas Air Park in Basin Creek.
A small bit of rain fell on the lightning-sparked fire overnight, but the fire is zero-percent contained.
All pre-evacuation notices issued Sunday afternoon remain in effect. A reverse 911 call system has been set up for 146 residents in Trappers Crossing and areas northwest of the fire.
Approximately 50 firefighters were working the fire Monday morning and more crews were expected to arrive throughout the day.
Helicopters and air tankers continue dropping water on the flames.
The cause of the fire remains unknown.