Heavy rain muscled back into Maui on Tuesday night, triggering a flash flood warning that ran until 9:15 p.m. HST and putting already-soaked neighborhoods on edge. The alert warned of rapidly rising water and urged residents and visitors to head for higher ground and steer clear of streams, culverts and flooded roadways. County officials stressed that saturated soils from recent storms mean even brief downpours can turn dangerous fast, with road closures or rescues possible with little notice.
State and federal alerts
The Hawaii Emergency Management Agency posted the warning on X, amplifying the National Weather Service alert that was in effect until 9:15 p.m. HST Tuesday. The Hawaii Emergency Management Agency also reminded followers that its social channels are not monitored around the clock and that anyone in immediate danger should call 9-1-1.
What the NWS advised
The National Weather Service in Honolulu said flash flooding was occurring or expected to develop quickly in affected spots and urged people to move immediately to higher ground and avoid walking or driving through flood waters. The National Weather Service in Honolulu noted that runoff from saturated soils and steep terrain can send life-threatening water surging into valleys and low-lying neighborhoods with little warning.
Where rain is heaviest
Meteorologists cautioned that the system could deliver widespread heavy showers across Maui County, with guidance showing totals of roughly 1 to 10 inches in many areas and higher amounts over interior and mountain zones. Maui Now reported that a statewide flood watch remained in effect through Friday as forecasters tracked additional tropical moisture feeding into the islands.
How to stay safe
Local officials urged residents and visitors to avoid driving through standing water, move away from stream channels and have an evacuation plan ready if waters rise. To receive official notifications, the county’s alert signup and guidance pages offer instructions and evacuation-zone tools. The Maui County Emergency Management Agency maintains MEMA Alerts and other resources for flood response and preparedness.
Why the threat is elevated
Heavy storms in mid-March already brought widespread flooding and hundreds of rescues, leaving soils saturated and retention basins fuller than usual, which makes new rainfall more likely to turn quickly dangerous. AP News documented that earlier event and the ongoing strain on infrastructure, underscoring why even short bursts of heavy rain can pose an outsized risk right now.
