Roads are melting in Yellowstone

For the past ten years the water in some parts of Yellowstone National Park has been heating up and causing the ground to rise; by 2010 the rise in some areas was one foot. Wyoming's hot summer has not made things better. Now the asphalt on some roads in the park is melting to such a degree that the roads are closed to tourists. There is even a possibility that you could step through the ground and into boiling water.