"It's called 'black ice' because it tends to look like the rest of the pavement on the road, although in reality, it's actually clear," the US Forest Service notes. "Black ice forms without creating bubbles, which allows it to blend in with any surface it forms over. Black ice is dangerous precisely because it's hard to detect."

With freezing conditions in full swing, officials warn residents of potential hazards. To avoid risks, stay off the roads, check your heating methods, and protect your pipes. Stay safe, Houston!