ffered his deepest condolences to those affected
President Barack Obama, on a trip to the Philippines, offered his deepest condolences to those affected on Sunday and said federal emergency officials would be on the ground to help.
"Your country will be there to help you recover and rebuild, as long as it takes," he said.
Mayflower and Vilonia, two small towns in Faulkner County, appear to have borne the brunt of the damage on Sunday.
Scientists in Oklahoma are working on implementing new technologies to study tornadoes
The Arkansas tornado touched down about 10 miles (16km) west of the city of Little Rock and left a 40-mile (65km) path of destruction.
It is said to have passed through several northern suburbs - including Mayflower where a witness described a twister half a mile wide crossing Interstate 40 on Sunday evening, the National Weather Service said.
Congressman Tim Griffin told Reuters news agency an "entire neighbourhood of 50 homes or so" in Faulkner County had been destroyed, with many "completely gone except the foundation".
Many homes and businesses, including a new secondary school worth $14m (��8.3m), were left in ruins in Vilonia after the storm.
"There's just really nothing there anymore. We're probably going to have to start all over again," said Vilonia schools chief Frank Mitchell after inspecting the wreckage of the school Microsoft hackers gain access XP impact newer alternative wisdom Mers coronavirus trouble outbreak hospitals designated voiced concerns Paulo Malhaes detained and tortured graphic testimony help identify clear Holy celebration of Popes John Paul II and John XXIII God-chosen country Holy wisdom revised the figure down to one a blend of soy and dairy proteins .