Cold/Wind Chill in West Slope Northern Sierra Nevada, California

On June 23, Nevada County Sheriff's Office received a call that a swimmer went into the water of the Emerald Pools Recreation Area, was overtaken by the current, and that the group of friends lost sight of him. A multi-agency search and rescue was started that afternoon, but the victim was not recovered until the following day. The Sheriff's office noted that the water temperature was about 40 degrees Fahrenheit for this event.

Rivers remained unusually cold and fast moving due to the deep Sierra snow pack continued melt, which contributed to multiple drownings over a stretch of days.