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Sea-level rise has increased frequency of extreme coastal flooding worldwide, study finds
https://news.tulane.edu/pr/sea-level-rise-has-increased-frequency-extreme-coastal-flooding-worldwide-study-findsJune 10, 2026 1:00 PM | Stacey Plaisance
Human-caused sea-level rise has significantly increased the frequency of extreme coastal flooding worldwide, according to a new study led by a Tulane University researcher.
The research, published in the journal Nature Climate Change, found that coastal flooding events expected only once every 100 years are now, on average, about 12 times more likely to occur.
Climate change has made those events about four times more likely since 1900, said the study’s lead author Sönke Dangendorf, the David and Jane Flowerree Associate Professor in River-Coastal Science and Engineering at Tulane University School of Science and Engineering.
…
"Extreme sea levels occur when high tides, storm surge and rising baseline sea levels combine. As sea levels rise, smaller storms can produce flooding that previously required more severe conditions,” Dangendorf said. “At nearly half of the 130 sites analyzed in the study, a flood expected once every 100 years in 1900 now occurs at least once per decade.”
…
Dangendorf, S., Sun, Q., Maduwantha, P. et al. Human-driven sea-level rise has quadrupled the frequency of coastal sea-level extremes since 1900. Nat. Clim. Chang. (2026). https://doi.org/10.1038/s41558-026-02659-0
Human-caused sea-level rise has significantly increased the frequency of extreme coastal flooding worldwide, according to a new study led by a Tulane University researcher.
The research, published in the journal Nature Climate Change, found that coastal flooding events expected only once every 100 years are now, on average, about 12 times more likely to occur.
Climate change has made those events about four times more likely since 1900, said the study’s lead author Sönke Dangendorf, the David and Jane Flowerree Associate Professor in River-Coastal Science and Engineering at Tulane University School of Science and Engineering.
…
"Extreme sea levels occur when high tides, storm surge and rising baseline sea levels combine. As sea levels rise, smaller storms can produce flooding that previously required more severe conditions,” Dangendorf said. “At nearly half of the 130 sites analyzed in the study, a flood expected once every 100 years in 1900 now occurs at least once per decade.”
…