NEW : Nashville flooding prompts many rescues , lifts business off foundation . Parts of 21 states are under some type of flood watch or warning Friday . Comment: More than 2 inches of rain may fall quickly in Ohio , West Virginia and Kentucky .
NEW : Nashville flooding prompts many rescues , lifts business off foundation . Parts of 21 states are under some type of flood watch or warning Friday . Southeast Kansas and southern Missouri have an extreme flooding risk . More than 2 inches of rain may fall quickly in Ohio , West Virginia and Kentucky .