By Maria Caspani (Reuters) – Emergency crews worked on Sunday to check, clear and restore power to areas hard-hit by severe storms and tornadoes that claimed the lives of at least six people and left a trail of destruction in Tennessee this weekend. In the city of Clarksville in Montgomery County, one of the hardest-hit areas, the Red Cross set up a shelter at a local high school to offer assistance to people who may have been temporarily displaced by the tornadoes. Shelters were also opened in Nashville and its suburbs. “The road to recovery is going to take time and we ask that citizens who …