DURANGO, Colo. -- The fire in the San Juan National Forest north of Durango has grown by 8,000 acres and has destroyed at least 10 homes.

MISSIONARY RIDGE FIRE MAP: Fire Perimeter MAP: Fire Perimeter (Large File) MAP: 3-D Map (Large File) RESOURCES Durango Interagency Fire Management Missionary Ridge Fire National Incident Report Durango Herald Call (970) 385-8700 for evacuation infor INTERACTIVE SURVEY: Should State's Forests Be Closed? MULTIMEDIA: Causes And Protections INFO Evacuation Tips Open Fires Banned Penalties Fireworks Shows On? Forest Closure Smell Smoke? Fire Bans

The blaze is threatening several subdivisions and has forced the evacuations of at least 1,700 homes. It has scorched at least 38,000 acres.

Fire managers say flames up to 500 feet high on Monday forced firefighters to back off and take refuge in safe zones. The blaze is so intense that it's burning around natural barriers such as roads, rivers and even reservoirs that supply water to southwestern Colorado.

More than 860 firefighters are working the fire and more crews are on their way.

Firefighters say hot, dry, windy weather won't help on Tuesday.