powerful storm are seen in Parkersburg, Iowa, ...

Debris covers the site of several homes after a powerful storm swept through Hugo, Minn. on Sunday, May 25, 2008.

Part of a house's roof sits in a swampy area, lower right, after severe storm swept through Hugo, Minn. on Sunday, May 25, 2008.

People evacuate their homes after a severe storm hit the town of Parkersburg, Iowa on Sunday, May 25, 2008.

An unidentified woman is taken to Aplington-Parkersburg High School for medical care by fire fighters after a powerful storm ripped through the town of Parkersburg, Iowa, Sunday May 25, 2008.

A path of destruction is seen after a severe storm swept through Hugo, Minn. on Sunday, May 25, 2008.

Both intact and destroyed houses are seen after a severe storm swept through Hugo, Minn., Sunday, May 25, 2008.

A path of destruction is seen after a severe storm swept through Hugo, Minn., Sunday, May 25, 2008.

A narrow path of destruction is visible across upper portion of photo showing where a severe storm swept through Hugo, Minn., Sunday, May 25, 2008.

Dennis Schipper looks over his flattened home after a powerful storm ripped through the town of Parkersburg, Iowa, Sunday, May 25, 2008.

Cars damaged by a powerful storm are seen in Parkersburg, Iowa, Sunday, May 25, 2008.