Falling Ice Closes Streets Around 1 World Trade Center

Pedestrians are re-routed to avoid potential danger around Manhattan's tallest building.
3:00 | 02/10/14

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Transcript for Falling Ice Closes Streets Around 1 World Trade Center
New questions tonight about the nation's tallest building we're talking about one the world trade where where are the ice shield to protect you from getting hit on the street. The problem want to head when falling ice stranded hundreds of commuters. At path stations -- -- hand this is a picture tweeted out by an Eyewitness News New York the dollar adjustment in lower Manhattan with the -- and some answers -- Bill is no Saturday -- shields or whatever we have people being rerouted around the building to a -- -- falling ice. In new information also that crews will be sending to the top of one world trade later on tonight around midnight to remove some of that ice. Until then it's been a pretty scary walk here in lower Manhattan. The nation's tallest building has been shedding ice for days now wreaking Havoc on commuters and forcing the closure of several streets in the vicinity of one world trade. -- -- -- -- -- -- -- -- Dominating thing that happens -- is is pretty dangerous to log on here. Really huge piece is just coming out of nowhere is that -- would build and -- huge pieces you're stuck in the past van Friday on -- night when they shut it down to -- Give us a -- a little bit of an inconvenience right. All is crazy about there's going to be a riot. The Port Authority which controls the World Trade Center site wouldn't talk to us on camera but they did release a statement. Since Friday morning the Port Authority has been taking every precaution to ensure public safety with regard to ice accumulation on buildings -- World Trade Center. One World Trade Center is still under construction -- not yet sealed or heated this happen and -- -- all over. That country all over the world in cold climates we feel pretty leaky buildings and you have to work really hard to make the buildings tight. We caught up with Chris Benedict an architect with her own science based. Theory about cascade of -- the problem may be air from inside the building leaking out. So warm moist air. Is coming out of the building and freezing on the first cold surface that it hits which in this case is the collapse. And on the corner here it's a little liquid before it freezes and -- warming icicles. And then if this surface heats up from the sun those icicles can really -- fall to the ground fortunately for New Yorkers this problem has a relatively easy fix this isn't. A problem simply -- the shape of the building it's a problem because the interior of this space here. Has not been completely sealed and it is fixable. -- sealing up that building can't come soon enough ice falling from that height and reach a speed of 100 miles per hour. Before hitting the ground. From lower Manhattan a meteorologist Jeff Smith for channel seven Eyewitness News.

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

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