A home destroyed by a wildfire is shown in an aerial photo over Boulder, Colo., Sept. 8, 2010.
People gather on an overlook to get a view of a wildfire burning outside Boulder, Colo., Sept. 8, 2010.
A slurry bomber drops a load of retardant to protect buildings from wildfire on Sept. 8, 2010 near Boulder. More than 6,000 acres have burned in the Fourmile Canyon fire, including scores of houses and other buildings. With the fire still burning, some 3,000 evacuated residents have not been able to return home.
A home and out buildings destroyed by a wildfire are seen in an aerial photo over Boulder, Sept. 8, 2010.
Eighth-graders from Shining Mountain Waldorf School watch a helicopter take off after loading up with water at Wonderland Lake to work a wildfire outside Boulder, Colo., Sept. 8, 2010.
A wildfire burns outside of Boulder, Colo. on Tuesday Sept. 7, 2010.
In this photo provided by Eric Peter Abramson, a line of buses are destroyed after a wild fire passed through Gold Hill, Colo. on Tuesday, Sept. 7, 2010.
A firefighting helicopter flies over a plume of smoke from a wildfire west of Boulder, Colo., on Tuesday, Sept. 7, 2010.
Standing on an overlook outside the Boulder County Justice Center in Boulder, Colo., Andy Powell surveys a a wildfire outside of Boulder on Tuesday Sept. 7, 2010. Powell rents a home in the direction of the plume of smoke.
Dee Spencer, right, who lost her home in a wildfire near Boulder, Colo., on Monday is comforted by Beth Byerlein after a briefing on the fire in Boulder, Colo., on Tuesday, Sept. 7, 2010. Firefighters are fighting the blaze that forced the evacuation of over 3,000 people.
A slurry bomber works against the fire in Boulder, Colo. on Tuesday, Sept. 7, 2010. Gov. Bill Ritter declared a state of emergency Tuesday as officials nearly doubled the fire's estimated size to more than 7,100 acres, or 11 square miles. At one point the plume from the fire could be seen in Wyoming, 90 miles to the north.
Fire extends beyond the hills over Broomfield, Col. on Monday, Sept. 6, 2010. At one point the plume from the fire could be seen in Wyoming, 90 miles to the north.
Kurt Rieder, in white hat, with his 9 year old daughter Lily watch the smoke plume from a wildland fire burning in the Four Mile Canyon area just west of Boulder Colo. on Monday, Sept. 6, 2010. High winds pushed the smoke and ash eastward over the Colorado plains.