BISMARCK, N.D. - Pressure ridges are popping up all over frozen lakes, which makes ice fishing unsafe for anglers.
The Game and Fish Department wants to remind sportsmen to be cautious when they're out fishing.
Even though ice conditions may look safe, they can change quickly.
"It can change the conditions of a body of water, the ice on the body of water, real quick. You may go out in the morning and then come back across it, and it may have changed pretty quickly right at that pressure ridge," said Brian Schaffer, Game and Fish Department education coordinator.
Schaffer says depending on water currents and air temperatures, there can be open water under some pressure ridges.