On the evening of March 14, 2026, a tense calm settled over Oahu’s North Shore as residents in Waialua and Haleiwa found themselves on edge, watching the skies and the news for updates about the Wahiawa Dam. Over the past 24 hours, the region had been hammered by heavy rains—more than a foot, according to Island News—causing rivers to swell and the Wahiawa Reservoir to rise to dangerous heights. With the threat of catastrophic flooding looming, the Honolulu Department of Emergency Management (DEM) issued a clear message: be ready to evacuate at a moment’s notice.
The situation began to escalate on March 13, when the reservoir’s water level approached 83 feet by 6 p.m., creeping ever closer to the dam’s failure point at 90 feet. As DEM Director Randall Collins explained during a city briefing, “The water level has risen and conditions remain uncertain. A failure could send water downstream fast and lead to catastrophic flooding.” Collins emphasized that the notice was being issued early, “out of an abundance of caution,” and warned residents that if an evacuation order came, it would be time to leave immediately.
By 10 p.m., there was a glimmer of hope: water levels had dropped slightly to about 82.11 feet, marking the third consecutive report showing a downward trend. “It’s not dropping quickly, but it is dropping in the right direction,” Collins told Hawaii News Now. Still, with rain continuing to fall and the forecast calling for more heavy showers and possible thunderstorms, the risk had not passed. The DEM stressed that conditions were stable and trending positively, but the situation was being monitored around the clock in close coordination with state partners and the National Weather Service.
The evacuation zone, as outlined by Island News, included all of Haleiwa between Puuiki Street and Kamehameha Highway, and areas of Waialua from Kukea Circle to Otake Camp. Otake Camp residents had already been ordered to evacuate due to excessive flooding. For everyone else, the message was to be packed and ready. Collins urged, “If you need extra time, leave now,” specifically addressing kūpuna (elders), families with small children, people with disabilities, and anyone who might require help with transportation or medical equipment.
Preparing to evacuate was no small task. DEM officials advised residents to have a plan and supplies for at least three days, including medications, important documents, food, water, phone chargers, and pet supplies. “Make sure your Go-Bag of emergency supplies is ready, including medications, important documents and hygiene items. Put your Go-Bag by the door or in your car,” the Oahu Department of Emergency Management said in an alert. Residents were also encouraged to locate pets and be ready to crate or leash them—and to help neighbors who might need assistance evacuating or ask for help themselves.
Evacuation shelters were set up and ready to receive those fleeing the threat. The closest options included Waialua High and Intermediate School, George Fred Wright Wahiawa District Park, and Kahuku Elementary School. According to Hawaii News Now, shelters were far from full, with the nearest reporting about 11 people at last check. Collins reassured the public that there was ample capacity for anyone who needed to leave their home.
Communication was paramount. Collins outlined the multi-pronged approach to notifying the public if the situation worsened: wireless emergency alerts would be sent to cell phones, the island’s siren system would be activated, and, when possible, responders would go door-to-door or use loudspeakers to spread the word. Residents were urged to keep their phones charged and to rely on trusted sources for updates, like Honolulu Alerts and the city’s HNL Alert system.
Driving conditions were another serious concern. “Drive very, very carefully. Turn around. Don’t drive through high moving water and deep water,” Collins cautioned. The risk of flash flooding and the unpredictability of thunderstorms meant that roads could become impassable with little warning. Residents were repeatedly told to stay off flooded roads and avoid driving through standing water, as even a few inches of fast-moving water can be deadly.
The urgency behind these warnings was not just bureaucratic caution. As Collins explained, “It takes us about three hours to get responders in place and conduct an evacuation.” Given how quickly conditions could deteriorate, officials aimed to begin evacuations at least two hours before any potential threat to infrastructure or the reservoir itself. But with heavy rain bands moving through and the possibility of thunderstorms bringing two to five more inches of rain, timing was everything. “That uncertainty is one of the big reasons why we are leaning forward on this and taking the caution that we’re taking here,” Collins told reporters, as cited by Hawaii News Now.
Despite the anxiety, there were some reassuring signs. Collins noted that the dam itself had not shown signs of structural damage. The main concern remained the sheer volume of water and the potential for rapid, unpredictable rises in reservoir and stream levels. The spillway had crested at 82.8 feet before dropping slightly, but with more rain forecast, officials could not rule out the possibility of another spike.
Residents were also reminded to help one another. “Share information and offer to help if they will need assistance evacuating. Ask them for help if you need assistance,” the DEM advised. The sense of community, always strong in Hawaii, was especially vital as neighbors checked on each other and ensured that the most vulnerable had the support they needed.
For those who chose to leave early, the advice was clear: bring sleeping gear, clothes, enough food and water for three days, medications, important documents, and phone chargers. And don’t forget the pets! Shelters were equipped to handle families and their animals, a small comfort in a stressful time.
As the night wore on, officials continued their vigilant monitoring. The latest reports indicated that drainage was moving through the system faster than the rain was accumulating, offering hope that the worst might be avoided. “The rain is coming down, but the drainage is passing through the system at a much quicker rate than the rain is accumulating,” Collins said, as reported by Hawaii News Now.
With the situation still developing, the people of Waialua and Haleiwa remained alert, prepared to move if the call came. For now, the message from officials was simple: stay informed, be prepared, and look out for each other as the island weathered yet another test from nature.