By Kanishka Singh (Reuters) – Severe storms and tornadoes in Tennessee left at least six people dead on Saturday and caused what local emergency services described as extensive damage with tens of thousands of residents without power. “At this time we can confirm that three people are deceased, two adults and one child as a result of the tornado that touched down this afternoon. Additionally, 23 people have been treated at the hospital,” the Montgomery County in Tennessee said on its Facebook page. Three more deaths were reported in the suburbs of Nashville, the Nashville Office of Emergency M…