Tornadoes raked the Dallas area Tuesday, crumbling a wing of a nursing home, peeling roofs from dozens of homes and spiraling big-rig trailers into the air like footballs. More than a dozen injuries were reported, the Associated Press reports. Overturned cars left streets unnavigable and flattened trucks clogged highway shoulders. Preliminary estimates were that six to 12 twisters had touched down in North Texas, senior National Weather Service meteorologist Eric Martello said. But firm numbers would only come after survey teams checked damage Wednesday, he said. In suburban Dallas, Lancaster police officer Paul Beck said 10 people were injured, two of them severely. Three people were injured in Arlington, including two residents of a nursing home who were taken to a hospital with minor injuries after swirling winds clipped the building, city assistant fire chief Jim Self said…