By Dan Whitcomb (Reuters) – At least two tornadoes tore through north and central Texas on Monday, destroying homes and businesses, knocking out power and injuring at least several people. Multiple homes were damaged or left in ruins in Round Rock, Texas, a city of around 120,000 people about 20 miles from Austin, after a tornado touched down there, officials said. “We could see a funnel on the south side of Round Rock,” That funnel continued through the south side of the city,” Police Chief Allen Banks told an evening news conference. Banks said buildings in and around the city had suffered “…