See How Wildfire Smoke Transformed Niagara Falls Overnight

A single day made all the difference at one of North America's most iconic landmarks. Webcam images from EarthCam show Niagara Falls on July 14 under clear summer skies, then again on July 15, when a thick, orange-gray haze had swallowed the view almost entirely.

The dramatic shift is the result of wildfire smoke pouring south from more than 800 fires burning across Canada, dozens of them out of control in western Ontario. Steering winds have carried the smoke across the Great Lakes region, at times pushing air quality to unhealthy and even dangerous levels in nearby cities.