 Biden holds a news conference at the close of the NATO summit tomorrow. For five days, it has been a record-breaking 115 degrees or more in Las Vegas. In hurricane-ravaged Houston, it's hot and power is still out for many. CBS's Omar Villafranca is there. In the Lone Star State, hundreds of cars lined up for several blocks to pick up needed supplies. The heat index hit 100 degrees in Houston, where residents are rushing to distribution centers for food, water and ice.