I just found this article on Pinterest about drowning. Honestly it scared me because I naively thought drowning people splash and ask for help. Apparently it is usually silent and:
Now I read it, I remember DD as a baby once slipped under water in the tub before my eyes and to this day I shudder at how she looked fine under water (in the split second before I picked her up). It was really quiet, no splashing as one expects. I've already shared this will all parents I know and thought of sharing it here.