Flash Flood Warning Hawaii April 2026: Severe Rainfall Across the Islands

Latest Alerts and Warnings

As of April 10, 2026, the National Weather Service has issued a flash flood warning for Hawaii due to the intense rainfall affecting multiple areas across the islands. According to the Honolulu office of the NWS, heavy rains have been recorded since the early hours of the morning, with precipitation measures reaching up to 12 inches in certain locations like Hilo and Maui.

Local authorities have urged residents to stay informed of the rapidly changing weather conditions. Flash flooding can occur suddenly, endangering lives and property within a matter of minutes. As a precaution, Hawaiian officials have advised people to avoid low-lying, flood-prone areas and have emphasized the importance of having emergency evacuation plans in place.

Flood Stage and River Levels

Flood conditions have severely impacted areas around the Wailuku River in Hilo, which has risen significantly due to continuous downpours. The river’s current levels have exceeded the major flood stage by several feet, causing concern for nearby homes and infrastructure. Floodwaters have also submerged roads near the Ka’u coast, presenting serious hazards for those traveling in South Hawaii.

Across the island of Oahu, particularly in the Pearl City and Manoa regions, officials monitor streams and drainage channels as water levels continue to climb. Residents report minor landslides and blocked roadways, further complicating evacuation efforts.

Most Affected Communities

Communities in east Maui, including Hana and Haiku, have reported substantial flooding, cutting off some areas from essential services. Emergency crews are working around the clock to clear debris and ensure access to safe areas for stranded residents.

Northern sections of the Big Island, particularly around Waimea and Kohala, have seen intense rain and wind gusts measuring up to 40 mph, which have complicated relief operations. Officials stress the need for patience and promise continued efforts to restore normalcy as soon as conditions allow.

Road Closures and Evacuations

With numerous roads underwater and impassable, the Hawaii Department of Transportation has announced closures along critical transit routes, including sections of the Hawaii Belt Road and Kamehameha Highway on Oahu. Traffic advisories and detours are in effect, and authorities advise against non-essential travel.

Evacuation notices are in place for residents in flood-prone areas, including those living near the Wailuku River. Emergency shelters have been established in schools and community centers across Hilo and Honolulu to accommodate displaced residents. The state emergency management agency is coordinating efforts to provide relief and assistance.

For more on severe weather events like this, visit our Severe Weather Section.

For official updates, visit the National Weather Service.