Massive tornadoes tore a town-flattening streak across the South, killing at least 266 people in six states and forcing rescuers to carry some survivors out on makeshift stretchers of splintered debris. Two of Alabama's major cities were among the places devastated by the deadliest twister outbreak in nearly 40 years.

As day broke Thursday, people in hard-hit areas surveyed obliterated homes and debris-strewn streets. Some told of deadly winds whipping through within seconds of weather alerts broadcast during the storms Wednesday afternoon and evening.

"It happened so fast it was unbelievable," said Jerry Stewart, a 63-year-old retired firefighter who was picking through the remains of his son's wrecked home in Pleasant Grove, a suburb of Birmingham. "They said the storm was in Tuscaloosa and it would be here in 15 minutes. And before I knew it, it was here."

He and his wife, along with their daughter and two grandchildren, survived by hiding under their front porch. Friends down the street who did the same weren't so lucky — Stewart said he pulled out the bodies of two neighbors whose home was ripped off its foundation.

Alabama officials confirmed 180 deaths, while there were 33 in Mississippi, 33 in Tennessee, 14 in Georgia, five in Virginia and one in Kentucky.

President Barack Obama said he would visit Alabama Friday to view damage and meet with the governor and families devastated by the storms. Obama has already expressed condolences by phone to Gov. Robert Bentley and approved his request for emergency federal assistance.