More Frequent and Pervasive Coastal Flooding
Coastal floods, caused by storms or astronomical tides—or a combination of both—are becoming more common as sea levels rise.
King tides, the nickname for some of the highest astronomical tides of the year, are expected along the East and West Coasts this week, raising the risk of coastal flooding.
High tide flooding has doubled in frequency since 2000, and could double again, or even triple, in the next ten years.
A new analysis by Climate Central shows that concurrent flooding, or floods occurring in multiple places at the same time, is also on the rise. September 22nd set a record for the highest number of concurrent coastal floods in a September, with flood-stage water levels recorded at 84 currently active coastal tide gauges around the U.S.
Even low levels of flooding can have serious consequences for coastal communities, by closing roads, degrading infrastructure, and reducing property value.