Mother, sons hide in tub during tornado

Standing in front of the debris and single remaining wall that used to be her family's home,  Nicole Lawrence tells CNN's Ed Lavandera, "It's only by God's grace that I'm here." The one section of the house that didn't lose its ceiling is the bathroom where Lawrence and her two sons sought safety as the tornado passed through Lancaster, Texas.

Minutes after the three climbed into the bathtub, the storm hit. "It was like a freight train. It was very, very loud," said Lawrence. The two teens protectively covered their mom during the worst of it.

The other houses in the neighborhood were damaged, but none demolished as severely as hers. A neighbor helped locate a pair of shoes amid the wreckage and carried Lawrence outside. When her husband arrived, they smelled gas and immediately left the area, heading for North Arlington.