Firefighters are working to contain a blaze that broke out in Las Animas County earlier this week as it grew to more than 11,000 acres, the Colorado Department of Public Safety said Saturday.

Lightning caused a small fire 10 miles northwest of Kim about 8:30 a.m. Wednesday “in a remote location with steep canyons and cliffs,” officials said. Called the Cherry Canyon fire, it increased to 11,089 acres by Sunday morning, thanks to wind, high temperature and relative humidity.

The fire is 30% contained while four isolated structures are threatened. No injuries have been reported.

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