Paramedics were worried that Kay Dunn and her son Nathaniel Nelson could develop hypothermia if they were in the water too long.
Omaha police officers rescued two people and a dog from Carter Lake after their boat capsized.
An officer spotted the overturned boat in Carter Lake, Iowa, Sunday and called for help.
Paramedics were worried that 55-year-old Kay Dunn and her 32-year-old son, Nathaniel Nelson, could develop hypothermia if they were in the water too long.
Four other Omaha police officers responded and helped get the two people and their dog out of the water.
The two people who were rescued and one officer were taken to the hospital to be checked for hypothermia after being in the water for about 20 minutes.
The dog, Buster, was taken to the Nebraska Humane Society to get checked out.