Two of the three winning proposals were designed by Canadian firms: Q4 Architects and Sustainable T.O. Elizabeth George is a designer at Q4 Architects, which designed a tornado-proof house that will now be built in Joplin, Missouri. The 'Core' house (pictured below) features a 600 square-foot concrete core surrounded by flexible rooms. It essentially moves the tornado cellar above grade. Joplin is still rebuilding after a series of tornadoes destroyed blocks of buildings.