Gary Duong (25) and Daniel Reid (23) were both very strong swimmers. On one of the hottest days in 2015, they died in the cold waters of Harrison Lake, where they were swimming. They were unaware of its dangerously cold temperatures, strong currents, and the unpredictable sudden winds which can turn a flat surface of water into a small craft warning in a matter of seconds.  Their friends and family produced this very moving video warning others of the danger.