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A flood watch is in effect for Maui County through late Wednesday night as a narrow band of tropical moisture moves across Hawaii, bringing the potential for heavy rainfall, flash flooding and isolated thunderstorms.
The National Weather Service forecasts the heaviest rainfall late Tuesday night through the first half of Wednesday, with Maui County and Oahu facing the highest potential for flash flooding. Rain could linger into Thursday and Friday.
Maui County officials are urging residents and visitors to prepare for possible flooding and other weather-related impacts.
The Maui Emergency Management Agency and other county departments are coordinating with state, private and nonprofit partners and monitoring weather conditions.
"We recognize that this has been a busy weather season, and with so many events to prepare for, we understand that people may be experiencing storm fatigue. Still, we urge residents and visitors to remain vigilant, take time now to prepare and stay informed," Mayor Richard Bissen said in a news release. "Our County teams are ready and able to respond if weather conditions warrant."
Heavy downpours could cause streams and rivers to rise rapidly, particularly in low-lying and flood-prone areas.
Heavy rainfall and flash flooding are the primary concerns.
"We encourage everyone to prepare now and avoid unnecessary travel during periods of heavy rainfall. Never attempt to cross flooded roads or streams, whether on foot or in a vehicle," MEMA Administrator Amos Lonokailua-Hewett said. "Residents and visitors should also be prepared for potential power outages and disruptions to essential services."
County officials are encouraging residents and visitors to review family emergency plans, identify safe locations in case flooding threatens their homes or accommodations, and maintain at least 14 days of emergency supplies, including food, water and medications.
Residents also are advised to clear gutters and drainage areas around their homes, avoid unnecessary travel during heavy rainfall and stay away from streams, rivers and other waterways that may rise rapidly.
Officials urged the public to monitor weather forecasts, emergency alerts and possible road closures.
Meanwhile, Bissen’s annual Holomua Kākou event on Lanai, scheduled for Tuesday and Wednesday, has been postponed because severe weather forecasts prompted the cancellation of Lanai ferry service.
Residents can sign up for MEMA Alerts and Genasys Protect evacuation information at mauicounty.gov/MEMA.