Two personal watercraft operators were rescued by DNR conservation officers from the cold waters of Calumet Harbor on Monday.

According to a statement released today, the two men—wearing life jackets—were found bobbing in Lake Michigan about a mile outside Calumet Harbor after strong southerly winds set their personal watercraft adrift.

“They were thankful they were wearing their life jackets and realized how important the jackets were in keeping them afloat,” DNR said.

DNR noted that, at this time of the year, Lake Michigan waters are still cold—around 60 degrees—and that “fatigue can quickly set in when combined with the extremely high air temperatures.”

“Indiana conservation officers want to remind you that wearing your life jacket can save your life, just as it did for these two men over this past Memorial Day weekend,” DNR said.