Rising sea levels due to climate change may threaten tens of millions more people than previously thought, according to a new report. Writing in the journal Nature, researchers say that 90 percent of scientific studies use erroneous data when calculating the height of baseline coastal waters.
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Fact-check: The article accurately reports on a new Nature study published March 4, 2026, confirming 90% of hazard assessments use erroneous geoid-based baselines, underestimating coastal sea levels by ~0.25m on average (up to 1m+ regionally), leading to 77-132 million more people at risk from 1m sea-level rise. Multiple real-time X posts from March 4-5 discuss the study and AP coverage, with no contradictions; Africanews summary aligns precisely with the paper's findings.
The sea is higher than we think: Millions more at risk of rising sea levels, researchers say
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Researchers have found that rising sea levels due to climate change may pose a threat to tens of millions more people than previously thought, as most scientific studies use incorrect data to calculate baseline coastal water heights. This new report highlights the need for more accurate calculations to assess the true risk of sea level rise. The study's findings suggest that the impact of climate change on coastal communities may be more severe than previously estimated. Coastal areas and island