The death toll rises after a highway collapsed in southern China early on Wednesday, sending cars plummeting down a hill and killing dozens of people. Images taken after daybreak show charred vehicles piled up at the bottom of a ravine and a nearly 18 meter long gash in the Earth. Southern China has been bombarded with heavy rain in recent weeks. CNN's Kristie Lu Stout reports on the rising death toll and the urgent emergency service work at the scene.