Hawaii Severe Flash Flood Warning | Effective 09/06/2026 19:37
At 437 PM HST, Doppler radar indicated that moderate to locally heavy
showers have diminished over the Koolau Mountains and portions of
windward Oahu, with the heaviest rain falling at a rate of up to 1
inch per hour. Water levels in the Waiahole and Waikane Streams have
declined considerably, though Oahu Department of Emergency Management
recently reported that Kamehameha Highway remains closed at Waikane
and Waiahole.
HAZARD...Flash flooding caused by heavy rain.
SOURCE...Emergency management reported.