“Among the victims were young children trying to take shelter in the safest place they knew — their school,” he said Tuesday.
The town of Moore “needs to get everything it needs right away,” he added.
Obama spoke following a meeting with his disaster-response team, including Homeland Security Secretary Janet Napolitano and top White House officials.
The National Weather Service issued an initial finding that the tornado was an EF-4 on the enhanced Fujita scale, the second most powerful type of twister. It estimated that the twister was at least half a mile wide.
The Storm Prediction Center in Norman, Okla., forecast more stormy weather Tuesday in parts of Texas, Arkansas, Louisiana and Oklahoma, including the Moore area.
In video of the storm, the dark funnel cloud could be seen marching slowly across the green landscape. As it churned through the community, the twister scattered shards of wood, awnings and glass all over the streets.
Monday’s tornado loosely followed the path of a killer twister that slammed the region with 300 mph winds in May 1999. It was the fourth tornado to hit Moore since 1998.
The 1999 storm damaged 600 homes and about 100 businesses. Two or three schools were also hit, but “the kids were out of school, so there were no concerns,” recalled City Manager Steve Eddy.
At the time of Monday’s storm, the City Council was meeting. Local leaders watched the twister approaching on television before taking shelter in the bathroom.
“We blew our sirens probably five or six times,” Eddy said. “We knew it was going to be significant, and there were are a lot of curse words flying.”
Betty Snider, 81, scrambled inside with her son and husband. She put her husband, who recently had a stroke, in a bathroom, but there wasn’t room for both of them. So she and her son huddled in a hallway.