DALLAS - Up to a dozen tornadoes skipped through the densely populated Dallas-Fort Worth area in Texas on Tuesday, ripping apart homes, tossing tractor-trailer trucks into the air and injuring at least 17 people, but there were no reported deaths.

Ten to 12 tornadoes touched down during a massive storm that brought chaos from high winds, rain and hail to the nation's fourth most populous metropolitan area, said National Weather Service meteorologist Jesse Moore.

Brandy Beasley (L) and Bobbie Deen carry kittens they rescued from a home demolished by the tornado during the cleanup effort in Forney, Texas April 4, 2012. Thousands of residents were without power and hundreds of flights canceled on Wednesday as authorities surveyed the damage a day after up to a dozen tornadoes struck the densely populated Dallas-Fort Worth area of Texas. [Photo/Agencies[

Many of the 6.3 million area residents were forced to scramble for safety as the storm bore down during the early afternoon, when schools and workplaces were open.

Seven people were injured in the suburb of Arlington, police said. Most suffered only minor injuries but one person hit by a falling tree was in critical condition, said Arlington police spokeswoman Cheryl Carpenter.

In one of the hardest hit areas south of Dallas, Lancaster, tornadoes damaged 300 structures.

Of the 10 people injured in Lancaster, two of them were severely hurt, said Lancaster police spokesman Paul Beck.

Authorities were amazed that no one was killed given the intensity of the storm, the number of tornadoes and the population density of the area.

"We dodged a big bullet ... It really is a miracle," Dallas Mayor Mike Rawlings said in an interview on CNN.

The survival rate from a tornado is higher during the daylight hours because people are more likely to hear or see the warnings and take cover, meteorologists said. Twisters are most deadly when people are sleeping at night, they said.

One tornado lifted trucks like toys in the Flying J Truck Plaza in Dallas, said truck driver Michael Glennon, who caught the destruction on his video camera as debris swirled through the air.

"We've seen roofs blown off, houses totally flattened, tractor-trailers knocked over," Moore said.

On Tuesday evening, the storm system moved east into Oklahoma, Arkansas and Louisiana with the potential of producing high winds and more tornadoes, Moore said.

Sixth-grader Hailey Pellerin said she and other students had just started lunch when teachers quickly herded students back to their classrooms in their southwest Arlington elementary school.

"We had to duck and cover for two hours," she said. The students were seated, lined up against a wall in their classrooms and covered their heads. "The power went out so it was dark and hot."

The tornado passed about 200 yards (180 meters) from the school, her father David Pellerin said.

"We were so lucky because it came so close but passed by the two schools my kids attend," said Pellerin, the father of three.

Duncan Winters, 10, walks through the remains of his grandmother's home during the cleanup effort in Forney, Texas, April 4, 2012. [Photo/Agencies]