Unseasonably warm weather has raised dangers across Wisconsin from thin ice.
The Department of Natural Resources says ice on lakes and streams throughout the state should be treated as unsafe unless proven otherwise.
Conservation Warden Bill Engfer says ice conditions aren't safe in southern Wisconsin, and they're questionable across the northern half of the state as well.
The D-N-R offers some safety tips.
Number One is ... don't venture out on the ice alone.
Officials also advise those going on the ice to have something sharp nearby, such as picks or large nails, for digging into the ice if needed ... and never go onto rivers where currents may cause thin ice conditions that can't be seen from above.