(CBS DETROIT) - The Coast Guard's ice breakers have started working in the waters of the Great Lakes, in an effort to keep commercial shipping channels open. The Coast Guard's Operation Taconite ...

The Great Lakes reached their highest ice coverage in three years on Feb. 22, hitting 52.23%. Warming temperatures have caused that percentage to shrink to nearly zero. With continuing above ...

As of March 16, average ice cover across the lakes was roughly 13.5%. Lake Superior was at 9.2%, and Lake Michigan was at 10.7%.

The Great Lakes reached their highest ice coverage in three years on Feb. 22, hitting 52.23%. Warming temperatures have caused that percentage to shrink to nearly zero. With continuing above-freezing ...

With continuing above-freezing temperatures across the region, Great Lakes ice coverage has dropped to less than 10% since reaching a high over more than 50% in February. Great Lakes ice coverage ...