It’s the ice ridges that cause the most issues. They’re hard to see from a distance but can swallow your tires before you even realize what’s happening. These more dangerous conditions are expected to persist—and worsen—according to a climate change researcher at the University of Manitoba.

“With things becoming more variable, and working with ice that may be less thick than it used to be, I would expect less predictable situations,” said Alex Crawford, assistant professor of Environment and Geography at the University of Manitoba.