In a flood, the water may be flowing through large trees, and a non-swimmer might be able to grasp a branch, pull himself into the tree, and climb to a point above the water level. Self-control and presence of mind are crucial. read more
While some might disagree, I believe that someone who can lay still in the water without drowning isn't automatically a swimmer. For the sake of clarity, let's call our floater Bob and our drowner Duncan. read more
Being in the water with someone in a panicked state, like a drowning victim, can be fatal to both the rescuer and the drowning victim. If the victim is panicking, it may be safest to take a hold of him/her from behind. read more