At least 20 of the 51 victims of the storm were children caught in an elementary school in the eye of the storm, with a death toll expected to rise.

NPR: 10 Things To Know For Today

"I'm in a car running from the tornado, " said Amy Sharp, who last week pulled her fourth-grade daughter from the Plaza Towers Elementary School as a storm approached with 210 mph winds.

NPR: 2 Dead When Tornado Hits Oklahoma City Area

Search and rescue teams continued their desperate efforts at Plaza Towers Elementary, where the storm ripped off the school's roof, knocked down walls and turned the playground into a mass of twisted plastic and metal as students and teachers huddled in hallways and bathrooms.

NPR: Medical Examiner: 24 Dead In Oklahoma Twister