For the second straight week, millions in the Southwest are threatened by dangerous flooding. The flood threat continues through the weekend and stretches from Arizona into the Great Plains. CBS News’ Carter Evans reported this morning from Nogales, Ariz., where people are still recovering from last week’s deadly flooding -- and where, overnight, heavy rain pounded the state, causing streams to overflow. The remnants of Tropical Storm Odile were strong enough to cause flash flooding and send water raging down city streets not equipped to handle the sudden downpour.