HONOLULU, Hawaii — A rapidly deteriorating situation in Hawaii has prompted emergency evacuations for approximately 5,500 residents as a 120-year-old dam faces a critical risk of collapse. The crisis, unfolding on the island of Oahu, comes amid torrential rainfall that has already caused widespread flooding and significant damage.
Authorities issued urgent evacuation orders on Thursday, March 21, 2026, for those living downstream from the Wahiawa Dam, warning that it could fail at any moment. Water levels at the dam rose dramatically within 24 hours, surging from 79 feet to 84 feet – just six feet from its maximum capacity, according to reports.
The heavy rains have transformed streets into rushing rivers and inundated homes, with some structures being swept off their foundations. The North Shore region of Oahu has been particularly hard hit, with floodwaters reaching chest-height in some areas, officials said. The severity of the flooding has led to the rescue of over 230 people.
Hawaii Governor Josh Green described the damage as “disastrous,” noting that dozens, if not hundreds, of homes have been damaged. A full assessment of the devastation is still underway. “The destruction is undeniable,” Honolulu Mayor Rick Blangiardi added.
Rescue efforts are complicated by the weather and logistical challenges. National Guard troops and firefighters are conducting searches by air and water, but have faced disruptions from civilian drone operators. A group of 72 children and adults participating in a spring camp at “Our Lady of Kea’au” were evacuated by air after floodwaters cut off road access to the site.
The crisis extends beyond Oahu, with evacuation warnings likewise issued for parts of Maui, including communities near Lahaina, which was previously devastated by wildfires in 2023. Concerns center on the capacity of local drainage and retention ponds.
Meteorological data indicates that some areas of Oahu received between 8 to 12 inches of rainfall overnight, with peak amounts approaching 16 inches. The potential for further damage and displacement underscores Hawaii’s vulnerability to extreme weather events. Governor Green estimates the total damage could exceed $1 billion, making it one of the worst water-related disasters in the state’s recent history.
So far, there have been no reports of fatalities or missing persons, though approximately 10 individuals have been hospitalized for hypothermia. The situation remains fluid, and authorities are closely monitoring the Wahiawa Dam and the ongoing rainfall.
