Travel trailers and motor homes are piled on top of each other at Mayflower RV in Mayflower, Ark., Sunday, April 27, 2014.
Storm clouds move over I-49 near Nevada, Mo., Sunday, April 27, 2014. Severe thunderstorm warnings were issued for the area. (AP Photo/Orlin Wagner)
A row of lightly damages houses, top, face destroyed homes in a Vilonia, Ark., neighborhood Monday, April 28, 2014 after a tornado struck the town late Sunday, killing at least 16 people. (AP Photo/Danny Johnston)