As of Thursday, the entirety of the Great Lakes, which contain more than one-fifth of the world's surface fresh water by volume, were more than 45% frozen, according to the National Oceanic and Atmospheric Administration (NOAA). This closely aligns with historical averages.

With bitter cold temperatures in the forecast, safety officials are once again issuing a warning about dangerous ice conditions on Lake Erie.

The National Weather Service, Coast Guard and at least one local fire department is warning people to stay off the ice on Lake Erie Monday as conditions could be “dangerous.”