Boulder, Colorado wakes up to the threat of worsening wildfires

The famously well-planned and livable city escaped last week. But it's especially vulnerable to fires from nearby forests, experts say.

Pyrocumulus clouds from the East Troublesome Fire rise above Coal Creek Canyon in Colorado on October 21—just before the fire crossed the Continental Divide and roared into Rocky Mountain National Park.

Photograph by Amanda Windischmann

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