
A man is seen during the wreckage in Shawnee, Oklahoma, the United States, May 20, 2013. Two men were confirmed dead after tornadoes hit the US state of Oklahoma, officials said Monday. Tornadoes ravaged portions of central Oklahoma on Sunday, according to media reports. (Xinhua/Marcus DiPaola)

A resident hands a cooler to her sister in the wreckage in Shawnee, Oklahoma, the United States, May 20, 2013. Two men were confirmed dead after tornadoes hit the US state of Oklahoma, officials said Monday. Tornadoes ravaged portions of central Oklahoma on Sunday, according to media reports. (Xinhua/Marcus DiPaola)

A man peers through the wreckage in Shawnee, Oklahoma, the United States, May 20, 2013. Two men were confirmed dead after tornadoes hit the US state of Oklahoma, officials said Monday. Tornadoes ravaged portions of central Oklahoma on Sunday, according to media reports. (Xinhua/Marcus DiPaola)

Rescuers search for lost animals in Shawnee, Oklahoma, the United States, May 20, 2013. Two men were confirmed dead after tornadoes hit the US state of Oklahoma, officials said Monday. (Xinhua/Marcus DiPaola)

People rescue a cat on the wreckage in Shawnee, Oklahoma, the United States, May 20, 2013. Two men were confirmed dead after tornadoes hit the US state of Oklahoma, officials said Monday. (Xinhua/Marcus DiPaola)

Rescuers search through rubble in Shawnee, Oklahoma, the United States, May 20, 2013. Two men were confirmed dead after tornadoes hit the US state of Oklahoma, officials said Monday. (Xinhua/Marcus DiPaola)

A man and a woman look through the wreckage in Shawnee, Oklahoma, the United States, May 20, 2013. Two men were confirmed dead after tornadoes hit the US state of Oklahoma, officials said Monday. (Xinhua/Marcus DiPaola)

Rescuers search for lost animals in Shawnee, Oklahoma, the United States, May 20, 2013. Two men were confirmed dead after tornadoes hit the US state of Oklahoma, officials said Monday. (Xinhua/Marcus DiPaola)

A rescuer brings out a dog from a damaged house in Shawnee, Oklahoma, the United States, May 20, 2013. Two men were confirmed dead after tornadoes hit the US state of Oklahoma, officials said Monday. (Xinhua/Marcus DiPaola)