VALDOSTA, Ga. — Fear lingers in this hard-hit city, where trees toppled onto houses and several downtown buildings were destroyed. Anxious families worry their community could be without power for weeks in the wake of Hurricane Helene.Valdosta residents seeking bottled water, ice, tarps and food passed through an ever-growing line of cars Saturday morning at the Lowndes County Civic Center.The biggest concern, some said, was the massive power outage in their city and the uncertainty…