Surprise Downpour Brings Flooding to Honolulu Neighborhood

Crews assess damage after sudden storm overwhelms Manoa Valley area.

Mar. 25, 2026 at 4:18am

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A surprise downpour in Honolulu on Monday sent floodwaters raging through a neighborhood near downtown, the latest in a series of storms and flooding that have pummeled Hawaii over the past two weeks. Residents were cleaning up from the worst flooding to hit the state in two decades when the new storm unleashed several inches of rain, sweeping away parked cars and swamping much of the Manoa Valley area. The ferocity of the downpour even took National Weather Service meteorologists by surprise, as their models failed to predict the amount of moisture that remained from a powerful winter storm system.

Why it matters

The intensity and frequency of heavy rains in Hawaii have increased amid human-caused global warming, experts say. This latest flooding event highlights the growing threat of extreme weather events in the state, which has already seen over $1 billion in damage from the recent storms. The situation also raises questions about the ability of weather forecasting models to accurately predict the severity of these types of localized, intense rainfall incidents.

The details

The downpour on Monday dumped 2 to 4 inches of rain per hour in the Manoa Valley area, with one rain gauge recording 6 inches. This highly localized deluge transformed streets into raging rapids, sweeping away parked cars and swamping much of the neighborhood. Residents were shocked by the sudden and intense flooding, with one describing the water as "just keep[ing] coming." Authorities said hundreds of homes on Oahu's North Shore had already been damaged by flooding from the previous week's storms.

  • The latest bout of storms and flooding has pummeled Hawaii over the past two weeks.
  • Residents along Oahu's North Shore were cleaning up from the worst flooding to hit Hawaii in two decades when Monday's storm hit.
  • The surprise downpour on Monday unleashed several inches of rain on the southern part of Oahu.

The players

Andrew Phomsouvanh

A resident who recorded video of the streets transformed into a confluence of rapids.

Natalie Aczon

A resident who went to the drugstore and returned to find water roaring down the street next to the shopping center.

Cole Evans

A National Weather Service forecaster who said their models failed to predict the amount of moisture that remained from the powerful winter storm system.

Josh Green

The Governor of Hawaii who said the cost of the storms could top $1 billion, including damage to airports, schools, roads, homes and a Maui hospital.

Molly Pierce

A spokesperson for the Oahu Emergency Management Agency who said officials were cautiously optimistic the rains are finally ending.

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What they’re saying

“I was shocked to see how much flash flooding there was in my area. The water just keeps coming.”

— Andrew Phomsouvanh

“People came running out from Longs and one of the guys actually said, 'That's my white car.' And it had elevated.”

— Natalie Aczon

“When you think it's over it's not quite over.”

— Cole Evans, National Weather Service forecaster

“Most of us have not seen something that just keeps going like this. We feel like we keep getting punched down. But we'll keep getting back up.”

— Molly Pierce, Oahu Emergency Management Agency spokesperson

What’s next

Governor Josh Green has submitted a major disaster declaration request to the Trump administration to seek federal aid for the state.

The takeaway

This latest flooding event in Hawaii underscores the growing threat of extreme weather driven by climate change, and the challenges weather forecasting models face in accurately predicting the severity of these localized, intense rainfall incidents. The state's resilience is being tested, but officials remain determined to recover and rebuild.