Blizzard Buries Major Midwestern Cities

Heavy snow accumulation worries residents; roofs on verge of collapse.
1:38 | 02/26/13

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Transcript for Blizzard Buries Major Midwestern Cities
evening to that massive blizzard burring 19 states tonight. There is a new worry. The heavy snow on rooftops. Abc's meteorologist ginger zee with that tonight as she starts with the pictures from chicago. Reporter: Chicago tonight is in the thick of it. Roads caked, the evening drive and the driving snow not pretty. It's bad. Visibility is really bad. Reporter: It's all the same storm that sent plows off the road in kansas city. And encased parts of texas and oklahoma. From above, you can see where the snow started and where it stopped. In wichita, the weight of the snow sent it crashing off this building. The snow so heavy and wet in missouri, this building south of kansas city crumbled. And in oklahoma, this roof killed a man after it buckled. We haven't had snow here like this in 20 years. Reporter: Shawn fixes roofs for a living. He's had several calls today. These roofs here that are flatter, they can't take as much weight. A steeper roof, more pitch, the weight handles it better. Reporter: Get this. A foot of wet snow on your roof can add up to 20 pounds per square foot. That's like havg several cars on top of your roof. Experts tell us, if you hear any creeking or popping sounds, get out. And the next step? You can call a roofing company to try to get them to remove it. Reporter: You see that huge tree right behind me into that house? Well, that's been a problem with this heavy, wet snow, too. And it is snowing again here. But this is just a little bit. Most of the storm has moved into chicago, wisconsin, michigan and as it moves to the north and east, by wednesday into thursday, just rain for the east coast.

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

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