Sea Level Rise Intensifies Coastal Flooding Risks
• Sea level rise, driven by heat-trapping pollution and climate change, is causing more frequent and severe coastal flooding in the U.S. and globally. High tide flooding, also known as nuisance or sunny day flooding, is becoming increasingly common, disrupting daily life and damaging infrastructure. Over the last decade, human-caused sea level rise has been responsible for about 80% of coastal flooding days across 71 U.S. locations. By 2050, high tide flooding is projected to occur 10 times more often than in
• Additionally, rising seas exacerbate storm surges, allowing floodwaters to reach farther inland and cause more extensive damage. Without significant reductions in pollution, these impacts are expected to worsen, threatening coastal communities, economies, and ecosystems.
Impact & Risks
Coastal communities, home to about 30% of the U.S. population, face increasing risks from rising sea levels. High tide flooding disrupts transportation, damages infrastructure, and affects access to essential services like medical care and schools. Storm surges, compounded by higher sea levels, can lead to life-threatening conditions, extensive property damage, and long-term health risks. The U.S. marine economy, valued at $511 billion, is also at risk due to disruptions in trade and supply chains. Ecosystems and wildlife habitats along the coasts are being eroded, further exacerbating environmental challenges.
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