Jan 09, 2014 at 02:39pm IST

Spectacular photos of the exact moment the massive Niagara Falls froze

The US side of the Niagara Falls froze. The frigid air and 'polar vortex' that affected about 240 million people in the United States and southern Canada will depart during the second half of this week, and a far-reaching January thaw will begin, according to AccuWeather.com. These amazing pictures by Reuters show the moment the Niagara Falls froze as temperatures dipped.