Between 2002 and 2013, rip currents were involved in 85 deaths and 256 rescues in the Great Lakes. But this still hasn’t changed the common misperception that rip currents are only a threat in the ocean. Currently, the lakes’ only safety measures against rip currents rely on observation of factors like wave heights and water levels. One researcher says it's possible to anticipate them based on possible causes in weather, the current’s interaction with structures along the shore, and formations in the sea floor and sandbars....