Over 230 Rescued As Flash Floods Hit Hawaii Authorities Warn Aging Dam Could Fail

Severe flash flooding triggered by heavy rainfall has forced large scale rescues and evacuations across Oahu in Hawaii, with officials warning that a 120 year old dam is at risk of imminent failure.

The floods, described as the worst to hit the island in two decades, inundated streets, swept away vehicles, and damaged homes in communities north of Honolulu.

Emergency sirens blared across the North Shore as residents were ordered to evacuate areas downstream of the vulnerable Wahiawa dam.

Authorities confirmed that more than 230 people were rescued as rising waters overwhelmed neighborhoods, while about 5,500 residents were placed under evacuation orders and many homes sustained damage.

According to Governor Josh Green, no deaths have been reported, though about 10 people were treated for hypothermia. Rescue efforts by air and water were complicated by civilians flying drones over affected areas.

In a separate operation, 72 children and adults attending a spring break camp were airlifted to safety after floodwaters cut off access routes.

The Wahiawa dam, originally built in 1906, has long been considered a high risk structure. Water levels surged rapidly within 24 hours, coming close to maximum capacity before beginning to recede, though officials warned more rainfall could reverse the trend.

Parts of Oahu recorded between 8 and 12 inches of rain overnight, with higher elevations receiving even more.

The flooding has been linked to seasonal storm systems known as Kona lows, which bring moisture heavy winds across the islands.

Damage estimates could exceed one billion dollars, though a full assessment is ongoing. Nearby areas including Maui are also on alert as authorities warn the situation remains volatile with more rain expected.