In Hawaii Kai, the lights were out and the air inside City Mill felt heavier than usual as staff guided customers one-by-one through dark aisles. Hawaii flash flooding and a powerful kona storm had already turned Saturday into a day of closed businesses, disrupted traffic, and anxious errands for basics—extension cords, sealant, anything that might hold back the next wave of rain.
What is happening with Hawaii Flash Flooding right now?
Across the islands, the storm’s impacts have been immediate and uneven: flash flooding warnings and hazardous rain rates on Hawaiʻi Island, widespread outages and recovery work in Honolulu, and extensive road closures and damage in Maui County.
On Hawaiʻi Island Saturday night, the National Weather Service issued updates describing heavy rain over the island and flash flooding conditions. The agency stated rain was falling at rates of 1 to 2 inches per hour, then later 1 to 3 inches per hour, with several stream gauges above flood warning thresholds and flooding reports that included highway closures and impacts in local communities.
In Honolulu, residents emerged after winds eased and rain subsided to find power outages, closed businesses, and traffic snarled by inoperable signals. In Nuuanu, the Board of Water Supply pumped water from one of the reservoirs closest to residential areas, sending it down Pali Highway while inspecting the berm of the dam; the stream from the reservoir remained within its banks.
How are residents living through the outages and damage?
The storm was felt in small, practical decisions—how to pay, how to keep food cold, how to keep water out. At City Mill in Hawaii Kai, staff operated on a propane generator and ran the store on a cash-only basis, escorting a steady stream of customers through the darkened interior.
“We were just happy that this store was here and helping everybody out — we were just picking up an extension cord so our generator can run upstairs, ” said Keola Takayama, a customer.
Jeremy Hannon, a Waimanalo homeowner, arrived with a different urgency after his home leaked. “We have a little home, and it’s flooded upstairs, so we’re buying some things to squeeze things out and reseal up the window so we don’t have another disaster today, ” he said.
Behind the counter and between aisles, employees treated the outage as a test of routine. Dylan Cooke, a City Mill Hawaii Kai supervisor, said staff are trained to stay open during outages, even when it changes the pace of every transaction. “All of the staff on hand, we have to be one-on-one with the guests who are walking through the store, ” Cooke said.
Outside, everyday movement became harder. The power outage closed many businesses, including gas stations and most of the Hawaii Kai Towne Center. Drivers navigated snarled traffic—some intersections reduced to confusion where signals had gone dark. Without electricity or cell service, households improvised their downtime. Eero Hannon put it plainly when asked what counted as fun: he was playing “video games that don’t need Wifi. ”
Where are rescues, shelters, and closures concentrated?
On Hawaiʻi Island, storm impacts included closures that cut off communities and pushed emergency operations into high gear. As of Saturday evening, Highway 11 in Kaʻū was closed at various points, cutting off the towns of Naʻalehu and Pahala. Additional flooding closed portions of Aliʻi Drive (Aliʻi Bypass) in Kona, with emergency officials and police asking motorists to avoid certain stretches due to flooding.
The County of Hawaiʻi said non-emergency facilities and operations would remain closed Sunday due to ongoing storm impacts. Flooding on Highway 11 and mauka roads isolated Wood Valley, Pāhala, Nāʻālehu, Green Sands Subdivision, and the Haao Springs Road/Waiohinu area; residents were asked to shelter in place.
Shelters remained open at the Nāʻālehu Community Center and Robert N. Herkes Gym in Pāhala, with another shelter opened at the Cooper Center in Volcano to assist residents unable to get home. The Hawaiʻi Fire Department rescued three residents from a flooded home near Whittington Beach Park and relocated them to the Nāʻālehu shelter, and also rescued two visitors from a stranded vehicle near South Point. A high-water vehicle from the Hawaiʻi National Guard was sent to the Nāʻālehu Fire Station to assist with emergency response.
In Maui County, the County described a powerful kona storm bringing widespread road closures and property damage tied to flooding, landslides, sinkholes, and downed power lines, among other impacts. The National Weather Service anticipated severe weather would continue through Sunday for Maui County. The Maui Fire Department conducted floodwater rescues overnight in South Maui, and dozens of people were cut off in Hāna due to road washout and moved to a shelter.
Maui Emergency Management Agency and the American Red Cross began proactively opening shelters around the county, with more than 100 people utilizing shelters countywide at the time of the county update. The county emphasized that roadways remained hazardous due to debris, flooding, and limited turnaround space, and urged the public against driving through pooling or moving water.
What responses are underway as the storm recovery begins?
Different agencies focused on different risks: keeping retail access running during outages, monitoring water infrastructure near homes, moving people into shelters, and conducting rescues where roads and homes flooded.
In Nuuanu, the Board of Water Supply inspected the berm of a reservoir dam near residential areas while pumping water and directing it down Pali Highway; the stream remained within its banks, offering one measure of stability amid broader disruption.
Along Keehi Lagoon, the storm also shifted the landscape in unexpected ways. Residents of shacks tucked near the water returned by rafts and small boats. A two-story floating house—previously moved from one bank of Keehi Stream to the other—was apparently washed out into the lagoon, then blown back by wind before grounding in Kalihi Stream. The fire department was called to rescue anyone inside the structure; when crews reached it, no one was found inside.
On Maui, Mayor Richard Bissen signed an emergency proclamation on March 10 that allows the County to access State and Federal assistance and streamline procedures to deploy resources, personnel, and services if needed. Countywide offices, parks, facilities, and services were closed on 3/14, with only essential workers reporting to duty.
What the storm reveals, when the rain finally eases
By the time the aisles in Hawaii Kai began to feel navigable again, the storm had already written different stories across the islands: a reservoir check near homes in Nuuanu, rescues and shelters on Hawaiʻi Island and Maui, roads cut off by water and debris, and households measuring the day in battery life and cash on hand. Hawaii flash flooding is not only a weather event in official updates—it is also the moment a neighbor needs an extension cord, a homeowner tries to reseal a window, and a community learns which systems hold and which ones fail when the power goes out.
