Hurricane Helene has caused catastrophic damage across the southeastern United States, leaving at least 100 people dead and millions without power. The storm, which struck as a Category 4 hurricane, severely impacted Florida, Georgia, the Carolinas, Tennessee, and Virginia with torrential rains, flash floods, and infrastructure destruction. North Carolina's Governor Roy Cooper described the situation as 'unprecedented,' noting extensive damage to roads and communication lines, and a significant number of people unaccounted for. Emergency responders, including the National Guard and FEMA, are conducting rescue operations and airlifting supplies to isolated areas. President Joe Biden has approved federal aid and plans to visit the affected regions. The financial cost of the disaster is estimated to range from $15 billion to over $100 billion.