Sunset at a Lake Michigan beach in Grand Haven, Mich. Credit: Michigan Sea Grant.

Rip currents warning sign at Au Train Bay, Au Train, Mich., Lake Superior. Credit: Michigan Sea Grant.

Swimmers playing in the surf, Lake Michigan. Credit: Michigan Sea Grant.

Life-saving devices: a ring buoy and a throw bag. Credit: Michigan Sea Grant.

Beachgoers at Hoffmaster State Park, Muskegon, Mich., Lake Michigan. Credit: Michigan Sea Grant