The U.S. Coast Guard said it rescued 18 people who were stranded on an ice sheet on Lake Erie. The ice sheet broke away as people were snowmobiling and doing other activities near Catawba Island, the USGS Great Lakes tweeted Sunday, Feb. 6. ”Rescue efforts began about 1 p.m. after an MH-65 Dolphin helicopter from Air Station Detroit noticed approximately 20 people on an ice floe, with several ATVs looking for a route back to land,” the Coast Guard said in a news release. A “Station Marblehead airboat and Air Station Detroit helicopter” was deployed along with a “Good Samaritan” with an airboat…