potentiallily powey power outag well. cnn s derek van dam, thank you so much. dozens of people are back on solid ground in the u.s. state of wisconsin after being stuck offshore on this drifting sheet of ice. the brown county sheriff s office says a large chunk of floating ice broke off near green bay mid-morning on saturday, leaving multiple people stranded. local media say that they were ice fishing. rescue teams had to move quickly, as the open water further moved and cracked the ice during the operation. within two hours, they had drifted about a mile from shore, before authorities were able to rescue all 34 people, amazingly, with no injuries. now, search and rescue efforts are set to resume in the coming hours in brazil, where an enormous cliff broke off and collapsed. it smashed into several tour boats on saturday, killing at least several people. the disaster happened at a lake popular with sightseers in southeastern brazil. rafael romo has the latest.