As first light rises over Lancaster, Texas on Wednesday, April 4, 2012 the devastation of one home is seen through a broken window. The National Weather Service says possibly as many as a dozen twisters moved across the Dallas-Fort Worth area Tuesday, bouncing in and out of neighborhoods, and destroying homes at random. The Red Cross estimates that 650 homes were damaged in Lancaster, one of the hardest hit areas. (AP Photo/Robert Ray)

Several cars are overturned after a tornado passed the area in Lancaster, Texas on Wednesday, April 4, 2012. Thousands of electric customers in North Texas have spent the night without power after a rash of tornadoes hit the area. Oncor on Wednesday reported nearly 8,400 homes and businesses without electricity a day after the severe storms. The Dallas-based utility says most of the outages are in the Arlington area, midway between Dallas and Fort Worth. Crews are working to restore power. (AP Photo/Robert Ray)

A vehicle is covered in tornado debris in Dallas, Texas Wednesday, April 4, 2012. Storm surveyors are fanning across North Texas Wednesday trying to determine how many tornadoes touched down in the region Tuesday, as people sift through the debris that used to be their homes. The National Weather Service says possibly as many as a dozen twisters moved across the Dallas-Fort Worth area, bouncing in and out of neighborhoods, destroying homes at random. (AP Photo/Robert Ray)

A house is a mass of debris Wednesday, April 4, 2012 after a tornado struck the region Tuesday, in Dallas, Texas. Storm surveyors are fanning across North Texas Wednesday trying to determine how many tornadoes touched down in the region Tuesday, as people sift through the debris that used to be their homes. The National Weather Service says possibly as many as a dozen twisters moved across the Dallas-Fort Worth area, bouncing in and out of neighborhoods, destroying homes at random. (AP Photo/Robert Ray)