Authorities said on Tuesday they have accounted for dozens of people who were previously listed as missing after the weekend’s deadly flooding in Tennessee, where the full scope of damage is coming into view. Officials also lowered the number of those killed by the storm—which destroyed homes and businesses, swept cars off the road, and left streets awash in mud—dropping the estimate to 18 from 21. As residents have gotten in touch with authorities, or found family members and friends at the local reunification center, only three people remain missing. Earlier, officials had put the number of missing at 50. “Three is too many,” Waverly Public Safety Chief Grant Gillespie said at an afternoon news conference. The scope of the damage came into sharper focus in hardest hit Humphreys County, as rescue teams continue to search house-to-house with trained dogs looking for victims. “We’ve got 100 to 125 homes off …