Wilmington, NC

Hurricane Florence stalled over coastal North Carolina in September 2018 and deposited more than 35 inches of rain on the Wilmington area over four days—producing river flooding, prolonged access disruption, and recovery timelines that extended weeks for some neighborhoods. Florence's primary damage mechanism was not surge; it was rainfall. That distinction is central to how Wilmington's flood score of 86, at the 94th national percentile, should be read: river systems, marshes, and stormwater drainage drove the losses as much as direct coastal exposure. Hurricane Fran in 1996 remains the durable benchmark for direct wind risk. We checked twice: South Wilmington's 28409 marsh and creek influence rises quickly, creating flood exposure meaningfully different from the historic downtown corridor even within the same city limits. Wilmington Island's 28411 zip code carries higher flood and wind sensitivity—island addresses consistently underwrite differently from mainland Wilmington proper. Back-bay and marsh exposure can matter as much as oceanfront proximity in this market. Annual premiums range from $2,300 to $6,200, with flood insurance required or strongly advisable in most low-lying and coastal-adjacent submarkets. Tree-fall risk and roof age influence storm underwriting: Wilmington's mature urban canopy is an amenity in normal conditions and a wind-damage liability in named storms. Heat at the 76th national percentile is moderate—not the dominant concern—but summer humidity compounds the livability questions that long-duration outages create after major storms. Florence demonstrated that Wilmington buyers need a river-and-marsh flood lens, not just a surge map. The two are related but not identical, and the properties that distinguish them are not always the ones closest to the ocean.

— Open Data Collective