It can take half a second before a river current can sweep you off your feet. If you are ever in that situation, the Cascade County Search and Rescue team may be called.They urge the public to practice simple safety when out enjoying open bodies of water. The Great Falls community was hit with a series of tragic drownings on the Missouri in July. Something that could have been preventable with a life jacket. Rivers can be deceiving. On the surface, the current may look calm. The fastest part of the current is 1/3 down from the depth. Despite hot and sunny temperatures, people out on the water can still get hypothermia.