After the storm: Sheet metal that was torn off a building during Friday's tornado in El Reno, Okla., ended up caught in a tree. Bill Waugh /Reuters /Landov hide caption

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A tornado forms over I-40 in Midwest City, Okla., during rush hour on Friday. Alonzo Adams/AP hide caption

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Rep. Cole speaks as U.S. Secretary of Homeland Security Janet Napolitano and others listen during a news conference in Moore last week. Brett Deering/Getty Images hide caption

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Mynor Sanchez, a resident of Moore, Okla., lives a few blocks away and three houses down from major destruction. He is volunteering Friday in the neighborhood with his church, Templo El Alabanza, trying to do any tasks with which residents need help. Katie Hayes Luke for NPR hide caption

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Relief agencies like the American Red Cross say monetary donations give them the greatest flexibility to address victims' needs. Erik Lesser/EPA/Landov hide caption

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Many school safe rooms, like this one inside Jeffries Elementary in Springfield, Mo., also serve as gymnasiums. Constructed with a $1.6 million grant from FEMA, which covered 75 percent of the cost, the shelter can hold more than 500 people — enough to accommodate all the school's students and employees. Scott Harvey/KSMU hide caption

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Rita Green carried a plastic bin of items as she helped a family friend salvage things from a home Thursday in Moore, Okla. Lucas Jackson /Reuters /Landov hide caption

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Marc Austin monitors radar and issues warnings at the National Weather Center in Norman, Okla., on Thursday. Katie Hayes Luke for NPR hide caption

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