Hawaii Flooding Emergency 2026 — 5,500 Under Evacuation Orders
Hawaii endured the worst flooding it has seen in more than twenty years this weekend, and the crisis is not over. A powerful Kona Low storm system — a type of low-pressure weather pattern that develops near the Hawaiian islands and produces intense rainfall — made two passes over the archipelago within a single week, dropping more than fifteen inches of rain across all of Hawaii's islands and triggering a cascading emergency that sent more than two hundred people to emergency shelters, required the airlift rescue of 72 children from a spring break camp, forced evacuation orders for 5,500 residents north of Honolulu, and brought a 120-year-old dam within six feet of failure.
What a Kona Low Is and Why This One Was So Dangerous
A Kona Low is a low-pressure system that typically develops southwest or west of Hawaii and moves in an unusual direction — toward the northeast rather than away from the islands as most Pacific storms do. The name comes from Kona, the leeward side of the Big Island, which typically experiences warm dry weather but gets drenched when a Kona Low passes overhead.
The March 2026 Kona Low was dangerous for two compounding reasons. First, it was unusually intense, dropping eight to twelve inches of rain overnight on Oahu's North Shore and nearly sixteen inches on Kaala — the island's highest peak — in a single day. Second, it arrived just one week after a previous storm system had already saturated the ground across all Hawaiian islands. Soil that has already absorbed maximum rainfall cannot absorb additional water — it simply redirects everything that falls into streams, rivers, and eventually roads and homes. The combination of saturated ground and extreme rainfall rates produced the conditions that turned a severe storm into a genuine catastrophe.
The Wahiawa Dam — An Infrastructure Failure Waiting to Happen
The most terrifying element of Friday and Saturday's emergency was not the flooding itself but the structure that nearly made it catastrophically worse. The Wahiawa Dam sits on the North Shore of Oahu, upstream from the towns of Waialua and Haleiwa. It was built in 1906 to support sugar production, collapsed once in 1921 and was rebuilt, and eventually came under the ownership of Dole Food Company.
For years before this weekend's emergency the dam had been flagged as dangerously inadequate. A 2022 Hawaii Department of Land and Natural Resources document classified it as a high hazard potential dam, stating explicitly that a failure will result in probable loss of human life. Dole received four separate notices between 2009 and 2021 about the dam's deficiencies and was fined $20,000 in April 2021 for failing to safely maintain the dam and its spillway. Experts warned at the time that the dam might not be able to safely handle flooding. The state passed a law in 2023 to acquire the dam and address its structural problems — but the transfer was not yet complete when Friday's storm arrived.
As the flooding intensified Friday morning, the dam water level rose from 79 feet to 84 feet overnight — just six feet below its maximum capacity. At 9 AM the Honolulu Department of Emergency Management issued its most urgent alert of the entire crisis, stating that Wahiawa Dam had not failed but was at imminent risk of failure with potential life-threatening flooding of downstream areas. Emergency sirens blared across the North Shore. Residents in Waialua and Haleiwa were told to leave immediately. The evacuation notice was reinforced with language that emergency managers rarely use and that carries unmistakable urgency — leave now.
The Rescues — 200 People Pulled to Safety
As roads flooded and became impassable, rescue operations ran around the clock across Oahu's North Shore. More than 200 people were rescued by emergency crews throughout Friday and into Saturday — pulled from submerged homes, stranded vehicles, and elevated positions where rising water had cut off all exit routes. About ten people were taken to hospitals with hypothermia after extended exposure to cold floodwaters.
The most dramatic rescue operation involved a spring break youth camp at a retreat called Our Lady of Kea'au on Oahu's west coast. Seventy-two children and adults were stranded when floodwaters cut off the entrance road to the camp. The Hawaii National Guard and Honolulu Fire Department conducted an airlift operation to safely remove all of them. Kimberly Vierra, a spokesperson for St. Francis Healthcare System which owns the retreat property, confirmed that the camp itself sits on high ground and that the children were never in direct danger from flooding — but authorities made the decision not to leave them isolated while the storm continued.
US Coast Guard boats and aircraft were deployed to the Haleiwa area, where the agency repeatedly warned residents not to enter or drive through standing or fast-moving water. Hawaii National Guard High Water Vehicle Teams patrolled North Shore streets with military transports, knocking on doors and offering evacuation assistance to any resident who wanted it.
Rescue operations were complicated by a problem that emergency managers find deeply frustrating in every major disaster — civilians flying personal drones over the flooded areas to capture footage. Ian Scheuring, a Honolulu spokesperson, directly called out the drone operators, noting that their aircraft were interfering with emergency helicopters conducting actual rescue operations. People flying drones during active search and rescue operations endanger lives and are subject to federal aviation violations.
Lahaina — A Community Already Traumatized Faces a New Threat
On Maui, the flooding emergency carried a particularly painful dimension for the community of Lahaina — a town still recovering from the devastating wildfire that destroyed much of it in August 2023. As the Kona Low moved east from Oahu toward Maui, officials issued an evacuation advisory for several Lahaina neighborhoods after nearby retention basins neared capacity. Some of those neighborhoods were among those burned in the 2023 wildfire.
The Maui Emergency Management Agency was careful to distinguish between an advisory — a recommendation to prepare and consider leaving — and a mandatory evacuation order. But for Lahaina residents who have spent the past two and a half years rebuilding their lives after one catastrophic event, any official warning carries weight that words alone cannot fully convey.
The Good News — Dam Held, Evacuations Lifting
By late Friday night the water level at Wahiawa Dam began to fall. By Saturday afternoon Governor Josh Green was telling CNN that the situation seemed to be trending in the right direction, adding we seem to be OK while also noting it is an old dam and that Hawaii is still in the middle of the storm. All remaining evacuation orders on Oahu were lifted at 3:28 PM on Saturday — though a boil water notice for the entire North Shore from Mokuleia to Turtle Bay remained in effect and will continue until water systems can be inspected and cleared.
Damage assessments have not been fully completed as of Saturday afternoon. Honolulu Mayor Rick Blangiardi said dozens if not hundreds of homes had been damaged and called the damage done thus far catastrophic. Governor Green estimated total damage could exceed one billion dollars across public and private sectors — a figure that would make this weekend's flooding one of the costliest natural disaster events in Hawaii history.
For the latest updates on evacuation status, shelter locations, road closures, and boil water advisories for all Hawaiian islands, the Hawaii Emergency Management Agency at dod.hawaii.gov/hiema maintains real-time official communications. Federal disaster assistance information and how to apply for FEMA support following a declared disaster is available through fema.gov.
The flooding that struck Hawaii this weekend was not a random act of nature disconnected from broader climate trends. Scientists have consistently projected that warming ocean temperatures in the Pacific will intensify Kona Low storm systems — producing more rain in shorter timeframes over saturated ground. The Wahiawa Dam came within six feet of failure because the dam built in 1906 was not designed for the rainfall amounts that 21st-century Hawaii now regularly experiences. No one died this weekend. With better luck and worse infrastructure, that could easily have been different.
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