>>Storms, tornadoes kill at least 45 in Alabama

Earlier on April 29, Prime Minister Nguyen Tan Dung sent a message of condolence to US President Barak Obama over the loss of life and property caused by a tornado on April 27.

This was the worst tornado in 37 years, sweeping six southern states.

According to the US National Weather Service, around 300 storms have hit the southern states since April 22, 2011.