More than 8.3 million acres have burned across the country this year, according to the National Fire Interagency Center.

In Colorado, fireghters battled the CalWood and Lefthand Canyon fires in Boulder county over the weekend, bringing the latter to full containment within a day. Those blazes arose as responders continue to fight the Cameron Peak fire, the largest wildfire in state history,

Two new fires spark in Colorado

The fast-moving CalWood Fire in the foothills of Colorado's Rocky Mountains quickly grew to nearly 9,000 acres after sparking in Boulder county Saturday.

"This is actually the biggest wildfire in Boulder County history," Boulder County Sheriff's Office Division Chief Mike Wagner said during a press briefing Sunday. "As far as by acreage, and so it's the largest our community has ever seen."

The CalWood fire has destroyed at least 26 homes in an area that had been ordered to evacuate near the town of Jamestown Saturday and it's believed several other homes have likely burned, Wagner said.

"We don't believe that their list is complete," Wagner said of the destroyed structures. "There's likely more structures that we just could not get to within that burn area, and so damage assessment teams are going to come and go out again tomorrow attempt to locate additional structures and report those out as we can."

A list of homes that have been destroyed will be posted to the Boulder OEM website, Wagner said.

About 1,600 homes and 2,600 structures were included within the perimeter of the mandatory evacuation zone issued Saturday, with about 3,000 people affected by the evacuations.

About 250 firefighters were in the field working to establish a direct line around the perimeter of the CalWood fire Sunday, Wagner said.

"That's one of their number one things is try to keep the fire knocked down and protect structures that have not been impacted by the fire yet," the chief said. "They're gonna continue to construct a direct fire line which I spoke around the perimeter of the fire to secure it."

Air operations were planned for Sunday, but weather conditions have prevented aircrafts from flying, Wagner explained.

"The plan was to try to hit the fire really heavy with air resources this morning there were a number of aircraft on order with the conditions you see down here, and visibility aircraft can't fly," Wagner said.

Additional resources, including a federal firefighting team, were scheduled to arrive Sunday and take over command of the CalWood fire by Monday morning, Wagner said.

Two people who were unaccounted for Saturday were located Sunday and one firefighter suffered a minor ankle injury battling the CalWood fire, according to Wagner.

A joint investigation has been launched for the CalWood Fire by the Boulder Sheriff's office and the US Forest Service, Wagner said.

A second fire -- the Lefthand Canyon fire erupted Sunday near the town of Ward, about 15 miles southwest of Jamestown, Boulder OEM said in a tweet. Nearly 150 homes were ordered to evacuate because of the blaze.

The Lefthand Canyon f