Hawaii Flood Watch remains in effect statewide through 6 p.m. Monday, and emergency officials are urging residents to stay alert as saturated ground increases the risk of flash flooding.
Even a small amount of additional rain could trigger rapid flooding, especially in areas soaked by record rainfall since mid-March, according to the National Weather Service and the Hawaiʻi Emergency Management Agency.
“State and county agencies across Hawaiʻi have been working around the clock to monitor conditions, support response efforts and keep our communities safe,” said Maj. Gen. Stephen Logan, the state Adjutant General and HI-EMA director. He thanked communities for following advisories and urged residents to stay informed and be ready to act if needed.
Hawaii Flood Watch: stay accurately informed
Conditions can vary widely by island and neighborhood. The most timely, location-specific alerts come from county emergency notification systems, and residents are encouraged to subscribe to their county alerts and continue monitoring trusted weather sources for real-time updates.
Officials remind the public to avoid driving through flooded roadways and to be prepared to take action if conditions worsen. Preparedness guidance is available at ready.hawaii.gov.
Brown Water Advisories and health precautions
The Hawaiʻi Department of Health has issued Brown Water Advisories for Oʻahu, Kauaʻi and Maui. Heavy rain can carry soil, debris, bacteria and other pollutants into nearshore waters.
Because advisories cannot be posted at every access point, residents should check the DOH Clean Water Branch page for current conditions and advisories. DOH also urges everyone to stay out of floodwaters, which can cause wound infections, skin rashes, gastrointestinal illness, tetanus and leptospirosis.
- Wash exposed skin with soap and water as soon as possible.
- Use alcohol-based wipes or sanitizer if clean water is unavailable.
- Clean and cover any wounds and seek medical care if needed.
- Launder contaminated clothing in hot water with detergent before reuse.
Oʻahu parks, trails and camping updates
All Oʻahu parks, trails and camping areas managed by the DLNR Division of State Parks reopened Saturday, April 11, 2026, except Kaʻena Point State Park, both the Mokulēʻia and Mākua-Keawaʻula sections, Puʻu o Mahuka Heiau State Historic Site, and the Wahiawā Freshwater State Recreation Area.
For additional context on how this event compares with other recent wet-weather systems, see Flood Watch canceled as threat eases across Hawaii.
