Firefighters searched one splintered pile after another for survivors Thursday, combing the remains of houses and neighborhoods pulverized by the nation's deadliest tornado outbreak in almost four decades. At least 297 people were killed across six states -- more than two-thirds of them in Alabama, where large cities bore the half-mile-wide scars the twisters left behind.

The death toll from Wednesday's storms seems out of a bygone era, before Doppler radar and pinpoint satellite forecasts were around to warn communities of severe weather. Residents were told the tornadoes were coming up to 24 minutes ahead of time, but they were just too wide, too powerful and too locked onto populated areas to avoid a horrifying body count.

"These were the most intense super-cell thunderstorms that I think anybody who was out there forecasting has ever seen," said meteorologist Greg Carbin at the National Weather Service's Storm Prediction Center in Norman, Okla.

Alabama Emergency Management officials said early Friday that the state had 210 confirmed deaths. There were 33 deaths in Mississippi, 33 in Tennessee, 15 in Georgia, five in Virginia and one in Kentucky. Hundreds if not thousands of people were injured -- nearly 800 in Tuscaloosa alone.

The storm prediction center said it received 164 tornado reports around the region, but some tornadoes were probably reported multiple times and it could take days to get a final count.

In fact, Brooks said 50 to 60 reports -- from the Mississippi-Alabama line, through Tuscaloosa and Birmingham and into Georgia and southwestern Tennessee -- might end up being a single tornado. If that's true its path would be one of the longest on record for a twister, rivaling a 1925 tornado that raged for 219 miles.