University of Hawai'i Study Warns of Sewage-Contaminated Flooding Risk in Waikīkī Due to Rising Sea Levels
A recent study conducted by the University of Hawai'i at Mānoa highlights the increasing risk of sewage-contaminated flooding in Waikīkī as sea levels continue to rise. According to Kayla Yamamoto, a climate modeling analyst and co-author of the study, the drainage infrastructure in Waikīkī is already failing. The research indicates that rising sea levels will cause storm drains to become conduits for contaminated water from the Ala Wai Canal, leading to backwash into low-lying streets and sidewalks. The study utilized a flood model that considers various sources of flooding, including rain, tides, underground water behavior, and storm drains, to map out the most significant flooding hazards. The findings suggest that tidal movements are becoming a more prominent flood threat in Waikīkī, shifting from being primarily rain-driven. The study warns that contaminated flooding will become more frequent and extensive, eventually occurring daily rather than being storm-driven. 
