Oahu is Sinking 40x Faster Than Predicted! Billions in Damages Expected!

2025-03-17 18:03:48.18

A new study reveals that parts of Oahu, Hawaii are sinking into the sea 40 times faster than previously predicted. This alarming rate of land subsidence, coupled with rising sea levels, poses a significant threat to Honolulu, Waikiki, and Pearl Harbor. Low-lying areas could be inundated within the coming decades, resulting in billions of dollars in infrastructure damage. Researchers from the University of Hawaii at Manoa spent nearly 20 years analyzing satellite data and found that while Oahu's average subsidence rate is around 0.6 millimeters annually, certain coastal regions are sinking at 25 millimeters per year. This accelerated sinking is particularly concerning in areas built on sediments and artificial fill, such as the industrial region of Mapunapuna. The study projects that by 2050, flood exposure in Mapunapuna could increase by over 50%, and by 2080, Waikiki, downtown Honolulu, and Daniel K. Inouye International Airport will experience more frequent flooding. The authors warn of major disruptions to Hawaii's tourism, coastal development, and ecosystems, with over $12.9 billion in infrastructure at risk on Oahu alone. The research aims to inform policy-makers and help mitigate the risks through improved flood exposure assessments, infrastructure resilience, and long-term urban planning.