The Most Powerful Twister to Hit Dallas Area in 20 Years

Eleven were killed and hundreds are without homes following the devastating tornado.
3:04 | 12/28/15

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Transcript for The Most Powerful Twister to Hit Dallas Area in 20 Years
Take a look at this devastation in Dallas. At least 11 people killed by powerful tornadoes. Homes reduced to nothing but rubble in Rowlette. And the path of destruction carved by a neighborhood nearby, in Garland, and it's not just Texas tonight. 80 million Americans in the path of this monster storm. This truck completely stuck. And it's on one of the busiest travel days of the season. This map shows every flight over the countriry now. Those are the lucky ones. Thousands of delays, and hundreds of cancellations, but we begin first with one of the most powerful twisters in years. Matt Gutman leading us off from hard-hit Garland. Matt, good evening. This apocalyptic scene goes on, house after house, for a 40-block swath. Looks like thousand-pound trucks just exploded out of the sky. Overnight, that tornado exploding over these north Texas suburbs, this one turning into a pillar of fire as blew up transformers. That's it! It's a tornado! Reporter: And sparking panic. Those 11 people killed in separate locations. At least five died as the storm descended onto I-30. I can see it. Just crossing the highway, right there. Reporter: Night those flashes of lightning. It's big! Reporter: Illuminating the monster. The sirens blared as that wedge darkened the sky. The same system bringing flash floods all the way to Missouri, killing six there. The tornado that crashed down in Garland, Texas, clocked as an ef4, whipping winds as fast as 200 miles per hour. In the morning light the devastation revealed. Walking and driving around the area, you can see it's total devastation in the area. Reporter: You can see that the line of damage, a football field wide, as if a giant claw had raked this neighborhood of Rowlette. Semis and trucks tossed like toys. Trees uprooted, ancient oaks snapped. The winds so strong, they even destabilized the town's water tower. Authorities evacuating everyone within a 250-foot radius. Power lines twisted around this shattered neighborhood like yarn. Hundreds of homes and structures damaged, dozens completely destroyed. And in the wreckage, we met Norma Jimenez. She and five family members, clustered in a bathroom as the storm ripped into her house. I'm just grateful we're alive and all safe. All this can be replaced. Reporter: For so many, the cleanup has begun. But it's gotten 40 degrees colder, and in the rain, it will make the cleanup that much more miserable. Cecilia? And that same system having a domino effect from north

This transcript has been automatically generated and may not be 100% accurate.

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