New tornado takes aim at Moore, Oklahoma

Mayor Glenn Lewis of Moore, Oklahoma, tells Anderson Cooper he can't believe his town is bracing for another potential tornado. He spoke by phone on AC360 while awaiting the storm in a shelter.

At least four reported twisters touched down in the Oklahoma City metropolitan area on Friday night leaving more than 60,000 people without power, according to the Oklahoma Gas and Electric Company.

The National Weather Service issued a tornado emergency for areas in and near Oklahoma City, which indicates a powerful tornado could head into a densely populated area with the potential for serious damage.

Moore was hit hard by deadly storms last week; houses and buildings crumbled in the powerful winds. The town was starting to clear away the massive amounts of debris just days ago. "I hope this doesn't scatter it all over again," said Lewis about the wreckage.