It's so cold that even parts of Niagara Falls are frozen.
Tourists and photographers have captured ghostly scenes of frozen portions around the falls, which roar down from heights as high as 176 feet.
The actual falls have not frozen solid or stopped flowing, University of Buffalo assistant professor Stuart M. Evans told The Buffalo News.
The mist coming off the water has frozen along with areas of slow-moving water, making the scene look like the planet Hoth from "Star Wars."
Despite the frigid temperatures, it would take a sustained arctic blast of weather to actually stop the falls from flowing.
"Even if it stays cold for a very long time, the falls are going to be extremely difficult to freeze," Evans said.