Southerners found their emergency safety net shredded Friday as they tried to emerge from the nation's deadliest tornado disaster since the Great Depression.
Emergency buildings are wiped out. Bodies are stored in refrigerated trucks. Authorities are begging for such basics as flashlights. In one neighborhood, the storms even left firefighters to work without a truck.
The death toll from Wednesday's storms reached 329 across seven states, including 238 in Alabama, making it the deadliest U.S. tornado outbreak since March 1932, when another Alabama storm killed 332 people. Tornadoes that swept across the South and Midwest in April 1974 left 315 people dead.
Hundreds if not thousands of people were injured Wednesday -- 990 in Tuscaloosa alone -- and as many as 1 million Alabama homes and businesses remained without power.
The scale of the disaster astonished President Obama when he arrived in the state Friday.
"I've never seen devastation like this," he said, standing in bright sunshine amid the wreckage in Tuscaloosa, where at least 45 people were killed and entire neighborhoods were flattened.
Mayor Walt Maddox called it "a humanitarian crisis" for his city of more than 83,000.
Maddox said up to 446 people were unaccounted for in the city, though he added that many of those reports probably were from people who have since found their loved ones but have not notified authorities. Cadaver-detecting dogs were deployed in the city Friday but they had not found any remains, Maddox said.
At least one tornado -- a 205 mph monster that left at least 13 people dead in Smithville, Miss. -- ranked in the National Weather Service's most devastating category, EF-5. Meteorologist Jim LaDue said he expects "many more" of Wednesday's tornadoes to receive that same rating, with winds topping 200 mph.
Tornadoes struck with unexpected speed in several states, and the difference between life and death was hard to fathom. Four people died in Bledsoe County, Tenn., but a family survived being tossed across a road in their modular home, which was destroyed, Mayor Bobby Collier said.
By Friday, residents whose homes were blown to pieces were seeing their losses worsen -- not by nature, but by man. In Tuscaloosa and other cities, looters have been picking through the wreckage to steal what little the victims have left.
"The first night they took my jewelry, my watch, my guns," Shirley Long said Friday. "They were out here again last night doing it again."
In Cullman, a town about 50 miles north of Birmingham, workers have been putting in long hours to clean up debris and exhausted police officers face the same problems as the people they are sworn to protect. Emergency responders have been waiting in hours-long lines with other drivers to get gas at stations without power.
The Federal Emergency Management Agency has responded to all affected areas and has officials on the ground in Alabama, Mississippi, Kentucky, Georgia and Tennessee, Director Craig Fugate said.