River pushed off course as floods leave Yellowstone ‘dramatically changed’

Heavy rain and rapid snowmelt caused a dramatic flood that may forever alter the human footprint on the national park's terrain

The forces of fire and ice shaped Yellowstone national park over thousands of years. It took decades longer for humans to tame it enough for tourists to visit, often from the comfort of their cars.

In just days, heavy rain and rapid snowmelt caused a dramatic flood that may forever alter the human footprint on the park's terrain and the communities that have grown around it.