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Effects of Hurricane Helene in North Carolina

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North Carolina after Hurricane Helene
NCDOTcommunications · CC BY 2.0

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Through Landslide and Weather station

As a result of the historic rainfall, several rivers in the region overflowed and inundated multiple settlements, destroying houses and infrastructure and cutting off power, transportation, and communications to many towns for prolonged periods. In addition, several mudslides occurred across the region, significantly worsening the damage. Helene was the costliest natural disaster in North Carolina history, surpassing Hurricane Florence from 2018.

Hurricane Helene also had significant public health impacts, increasing risk of a variety of physical and mental illnesses for those exposed to conditions such as flooding. This increased risk was the most elevated among older adults. The community responded through volunteer efforts organized by local government agencies. Helene also forced a Baxtor International plant to close, leading to potential consequences for the supply of certain medical supplies.

Background

Western North Carolina, and Appalachia as a whole, has historically been victim to significant flooding and damage caused by weakened hurricanes or their remnants, despite being far inland of coastal regions that typically bear the strongest and most publicized impacts. This is due to intense rainfall that can cause significant swelling of rivers and bodies of water, as well as torrents of water flowing down mountainous areas which cause destruction and damaging mudslides.

A 2025 study led by U.S. Geological Survey scientists suggests that landsliding during Hurricane Helene was concentrated on slopes facing southeast into the storm, the direction from which the heaviest rainfall approached the Blue Ridge escarpment. Multiple deaths and devastating destruction were a result of the steep terrain found on the mountains. This pattern is consistent with the storm's rainfall being enhanced as it moved up and over the mountains rather than landslides occurring randomly across the terrain. A field survey identified 2,217 individual landslides across the affected region by early 2025, up from an initial estimate of 1,155 recorded in the weeks after the storm. Separate research comparing the storm's landslides and 79 damaged bridges against pre-existing landslide-susceptibility maps found the maps had performed reasonably well at predicting where these landslides would occur.

For example, rainfall from Hurricane Andrew in 1992 spread across the southeastern United States along the Appalachian Mountains corridor; totals of over 5 in (130 mm) were reported near Ellicott Rock Wilderness.

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