It's really cold out.
Most folks just need to step outside their front door to confirm this fact, or check out these awesome photos of a gigantic snow shark in the front yard of a Minnesota home.
But you could also check out the following images that are making their way around the Internet today, as Reuters photographer Aaron Harris captured some amazing shots of a partially frozen over Niagara Falls.
This is what the Polar Vortex does to a 167-foot tall waterfall:
Don't be too fooled by talk on social media, however. The Falls are not completely frozen and The Washington Post's Caitlin Dewey says this happens nearly every winter.
"It's nothing out of the ordinary. It is not, to put it bluntly, big polar vortex news," she says. "It would take a lot more than a few days of cold weather to completely shut that off."
Still... cool pics, huh?!?