Storm chaser Lauren Hill was part of a team that recorded video of the massive tornado as it ripped through town.
"You could actually feel the vibration from the tornado itself as it was approaching," she said.
"We still have a bit of PTSD," she said. "It's devastating."
After the ear-shattering howl subsided, survivors along the miles of destruction emerged from shelters to see an apocalyptic vision. Homes and other buildings were shredded to pieces. Remnants of mangled cars were piled on top of each other. What used to be a parking lot now looked like a junkyard.
"People are wandering around like zombies," KFOR reporter Scott Hines said. "It's like they're not realizing how to process what had just happened."
James Dickens is not a firefighter or medic. He's actually a gas-and-oil pipeline worker. But that didn't stop him from grabbing a hard hat and joining other rescuers at Plaza Towers Elementary School.
"I felt it was my duty to come help," he said Tuesday after a long night of searching.
"As a father, it's humbling. It's heartbreaking to know that we've still got kids over there that's possibly alive, but we don't know."
Hiding in freezers
Hines said rescuers found a 7-month-old baby and its mother hiding in a giant freezer. But they didn't survive.
At the devastated hospital in Moore, some doctors had to jump into a freezer to survive, Lamb said.
Lando Hite, shirtless and spattered in mud, described how the storm pummeled the Orr Family Farm in Moore, which had about 80 horses before the storm hit.
"It was just like the movie 'Twister,' " Hite told KFOR. "There were horses and stuff flying around everywhere."
Moore, and the Oklahoma City region, are far too familiar with disaster. In 1995, 168 people died in the bombing of the Alfred P. Murrah Federal Building in Oklahoma City.
In 1999 and then again in 2003, Moore took direct hits from tornadoes that took eerily similar paths to Monday's storm. The 1999 storm packed the strongest wind speeds in history, Lamb said.
"We're a tough state. This is a tough community," Lamb said. "There is hope. We always have hope. We always have faith."
President Barack Obama, pledging whatever federal aid Oklahoma would need, praised teachers who protected their students.
"If there is hope to hold on to -- not just in Oklahoma but around the country -- it's the knowledge that the good people there and in Oklahoma are better prepared for this type of storm than most," he said. "And what they can be certain of is that Americans from every corner of this country will be right there with them, opening our homes, our hearts, to those in need, because we're a nation that stands with our fellow citizens as long as it takes."
More trouble brewing
The storm system that spawned Monday's tornado and several other twisters Sunday isn't over yet.
Southwest Arkansas and northeast Texas, including Dallas, are under the gun for severe weather Tuesday. Those areas could see large hail, damaging winds and tornadoes.
A broader swath of the United States, from Texas to Indiana and up to Michigan, could see severe thunderstorms.
"We could have a round 3," CNN meteorologist Ivan Cabrera said. "Hopefully, it won't be as bad."