The 416 Fire in southwestern Colorado grew to 16,766 acres by late Sunday evening.
The fire, which started on June 1, is still 10 percent contained.
A total of 813 people are fighting the fire as of Sunday evening. No structures have been lost.
Weather conditions will continue to be challenging. Precipitation is not forecast until at least the weekend. Winds are expected to increase throughout the week.
“Until the fuel conditions change — which is going to require a change in the weather — we expect the fire to continue showing the same kind of behavior in the near and mid-term,” Incident Commander Tood Pechota said.
The large wildfire has prompted the evacuation of an additional 859 homes in the Purgatory/Durango Mountain Resort, Lake Purgatory, Silver Pick Lodge, Cascade Village, and Mill Creek areas. That is in addition to the more than 1,300 homes that were previously evacuated, bringing the total to 2,156 homes.
The cause of the fire is still under investigation.