Hawaii Flooding: Residents Evacuated as Dam Threatens North Shore Towns

HONOLULU — Streets in Haleiwa, Hawaii, are underwater following severe rainfall on Friday, March 20, 2026, prompting evacuation orders for over 4,000 residents as officials warn of a potential dam failure. The Wahiawa dam, a 120-year-old structure, is at risk, leading to urgent calls for residents downstream to abandon the area. While there have been no immediate reports of injuries, emergency services are actively searching flooded areas for stranded individuals.

Rising Waters, Familiar Fears

The situation echoes concerns from a previous storm last week, which caused significant damage across the state, including washed-out roads and damaged homes. That earlier event saturated the ground, making the North Shore particularly vulnerable to this latest deluge. According to Ian Scheuring, a spokesperson for Honolulu, firefighters and lifeguards are utilizing jet skis to reach those stranded by the rapidly rising waters. Reports indicate that some homes have been swept away, though a precise count remains unavailable.

The evacuation order, issued at 5:35 a.m. Local time, urges residents to carpool due to heavy traffic. A shelter at Waialua High and Intermediate School was itself forced to evacuate due to flooding, with approximately 185 people and 50 pets being relocated to another center. This underscores the widespread impact of the storm and the challenges facing emergency responders.

A Damaging History

The potential failure of the Wahiawa dam is a particularly worrying aspect of this crisis. State Senator Brenton Awa, representing the North Shore, noted the growing development in the area and questioned how this unprecedented flooding will reshape the community. The dam was likewise a concern during last week’s heavy rains, but water levels receded as the storm passed. Now, yet, water is actively flowing over the spillway, increasing the risk of a breach.

Hawaii has a history of dam failures with tragic consequences. In 2006, the collapse of the Ka Loko dam on Kauai resulted in the deaths of seven people. Civil Beat reported in 2021 that Hawaii regulates 132 dams, many originally constructed for irrigation during the sugar cane industry era, highlighting the aging infrastructure and potential vulnerabilities across the islands.

Governor Green Addresses the Crisis

Hawaii Governor Josh Green addressed the situation via social media, stating that the Hawaii National Guard has been activated to assist with the response. He described the flooding as “highly severe,” particularly on the northern part of Oahu, with water levels reaching chest height in some areas. He characterized the day as “very touch-and-go,” emphasizing the urgency of the situation. The Honolulu Star-Advertiser is providing ongoing coverage of the unfolding events.

Widespread Flood Watch and Warnings

The National Weather Service has issued a flood watch for most of the state, with a flash flood warning specifically for the North Shore. The warning describes the flooding as “widespread life-threatening” and “extremely dangerous,” particularly in Haleiwa and Waialua. The region received between 8 and 12 inches of rain overnight, exacerbating the already saturated conditions from the previous week’s storm.

Community in Isolation

Senator Awa expressed concern about the isolation of the North Shore community, noting that some residents were unable to evacuate due to the flooding. He described the area as “cut off,” highlighting the challenges of providing assistance and assessing the full extent of the damage. Resident Kathleen Pahinui shared her anxieties about the aging dam, stating, “Just pray for us. We understand there’s more rain coming.”

The situation remains fluid, and authorities are closely monitoring the Wahiawa dam. Further rainfall is forecast for the weekend, raising concerns about the potential for continued flooding and further evacuations. The focus remains on ensuring the safety of residents and preventing a catastrophic dam failure. CW33 is also reporting on the developing situation.

Ongoing Monitoring and Potential for Further Evacuations

As of Friday afternoon, emergency management officials are continuing to monitor water levels at the Wahiawa dam and assessing the stability of other infrastructure in the affected areas. The possibility of additional evacuation orders remains, dependent on the progression of the storm and the condition of the dam. Residents are urged to stay informed through official channels, including local news outlets and the Honolulu Department of Emergency Management website.