The Dragon Bravo Fire in the North Rim of the Grand Canyon "exhibited extreme and volatile fire behavior" overnight and expanded to about 5,000 acres, fire managers said Sunday.

U.S. land managers are racing the clock as hotter, drier weather raises the risk of wildfires in the nation’s overgrown forests with each passing year.

"As stewards of some of our country's most beloved national treasures, we are devastated by the loss of the Grand Canyon Lodge," Aramark, the company that operated the lodge, said in a statement.