Safety officials are warning people to keep off the ice after warm temperatures created dangerous conditions and caused some people to break through.
The Douglas County Sheriff's Office says an ATV fell through on Lake Geneva near Alexandria on Friday.
Then Saturday, three people broke through the ice on Devils Lake, which is also in the area. Luckily, no one was injured.
The Chisago County Sheriff's Office also reports incidents involving thin ice. Officials say two men got stuck Saturday on Little Lake near Center City.
The men had walked out on the lake to fish, then the ice started sinking.
Lindstrom Fire Department had to use an air boat to rescue them. Neither was injured.
Officials from both counties warn people to be careful on the ice, or keep off it altogether.
Saturday's temperatures set records throughout the state. According to the National Weather Service, temperatures in the Twin Cities reached 70 degrees, beating the previous record by a single number.
KSTP says that makes the second day in a row that the cities met a record high.
Temperatures also climbed high enough in St. Cloud and Duluth to break records.
Thin ice warnings were issued back in February when temperatures were significantly colder. There were reports of people breaking through then, too.
Earlier this week, the deadline to remove ice shanties from lakes in the southern two-thirds of the state passed.
Anglers can legally keep their houses out on northern lakes until March 21 as long as the ice is thick enough.