Trailers lay smashed atop one another after a tornado reportedly tore through the southeastern portion of Dallas County, Texas, Tuesday, April 3, 2012, near Lancaster, Texas. The National Weather Service confirmed at least two separate "large and extremely dangerous" tornadoes in the Dallas-Fort Worth area. (AP Photo/The Dallas Morning News, G.J. McCarthy)

Photo by: G.J. McCarthy

Trailers lay smashed atop one another after a tornado reportedly tore through the southeastern portion of Dallas County, Texas, Tuesday, April 3, 2012, near Lancaster, Texas. The National Weather Service confirmed at least two separate "large and extremely dangerous" tornadoes in the Dallas-Fort Worth area. (AP Photo/The Dallas Morning News, G.J. McCarthy)