Swimming
Swimming isn't just for Olympic pools. Distance swimmers often hop into the freezing ocean or questionable lakes. Sometimes people find that they have pushed themselves to their limit and drown. Not much can be done about it if you're in the middle of a large body of water completely alone.
The Risk of Drowning
Drowning kills roughly 3,500 people per year. Around two in every 100,000 people will drown at some point (not necessarily resulting in death). We recommend that you swim near a lifeguard at all times, and if you're feeling up to doing something a bit more dangerous, try to bring a buddy with you.