Pancake ice has formed on Lake Michigan; Chicago firefighters say it poses a hidden danger
VIDEO: As sub‑zero wind chills settle in across Chicago, a rare and visually striking winter pattern has begun forming along the Lake Michigan shoreline: pancake ice — round, lily pad‑like discs that look sturdy, photogenic and deceptively walkable. But the Chicago Fire Department wants to send a clear warning: do not step onto the ice — any of it.
Deputy District Chief Jason Lach, who oversees CFD’s marine and dive operations, explained pancake ice forms when turbulent, freezing water begins to spin small chunks of ice into circular pads. From above, they resemble lily pads floating just off the shoreline.
“If you’re looking at it from above, it looks like a lily pad — just a circular disc in the water,” Lach said. The discs may appear thick, but their structure is uneven. Lach noted pancake ice “could be an inch in the middle and four inches on the outside, or vice versa,” making its stability impossible to judge from the surface.
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