Use extreme caution on local lakes
The Douglas County Sheriff's Office and Minnesota Department of Natural Resources (DNR) are advising people to use extreme caution on the ice as several fish shelters have fallen through the ice due to unusually warm temperatures and water on top of the ice.
It was also reported that there are several open areas of water on area lakes that are difficult to see. Ice heaves have also formed and authorities report that it is dangerous to cross the heaves - they're usually indicators of open water and weakened ice.
Anyone with a fishing shelter on an area lake is advised to check it regularly as ice conditions can change rapidly.
According to the DNR, 12 inches or more of old, partially thawed ice may not support the same weight as 4 inches of clear, newly formed ice.