Unfortunately, there are a lot of similarities between what we have going on right now and 2010 when Nashville flooded. The run up to that event were several smaller rain events that left the ground saturated and area reservoirs higher than normal. When the flooding system came in and parked over middle and west TN and dumped 10-18" of rain in 24 hrs, there was no where to hold/store the water.
I'm sure that the Corp and TVA are very concerned right now and are trying their best to run some water on down the system. With the Ohio flooding, the options may be limited to get rid of a bunch in a hurry. We need a period to dry out some, but it doesn't much look like we are going to get it.