The visitor center and a wastewater treatment plant were among the 50 to 80 structures lost, the park superintendent said.

Nearly 200 firefighters are working the South Rim fire at the Black Canyon of the Gunnison National Park. A lightning storm Thursday sparked numerous fires.

Colorado Gov. Jared Polis has verbally made a disaster declaration as several wildfires rip through more than 10,000 acres on the Western Slope and in Utah near the Colorado border.