The warmest average open body of water is the Salton Sea in California with an average water temperature of 92.4 degrees Fahrenheit.
The Salton Sea was created by a mistake when the runoff from the Colorado River flooded the Imperial Valley for 18 months before engineers could stem the flood. As a result, the unintended artificially created lake has a surface elevation is 69 meters below sea level with an average depth of 9 meters.
It will be site of one of Kate Greene‘s last cross-country Adventure Swims.
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