Kauai flash flood warning extended: 1-2 inches of rain per hour triggers Hanalei Bridge closure
m. on October 31, 2026, after rain fell at a rate of up to 1 to 2 inches per hour, forcing the closure of Kuhio Highway near the Hanalei Bridge.
The National Weather Service extended Kauai’s flash flood warning until 8:45 p.m. on October 31, 2026, after rain fell at a rate of up to 1 to 2 inches per hour, forcing the closure of Kuhio Highway near the Hanalei Bridge. Stream gauges at Hanalei River and South Fork Wailua River remained elevated as of 5:08 p.m. that day.
Key numbers
| Stat | Figure | Date | Source |
|---|---|---|---|
| Rainfall rate during warning | 1 to 2 inches per hour | October 31, 2026 | National Weather Service |
What happened
The National Weather Service issued a flash flood warning for Kauai on October 31, 2026, at 12:09 p.m. HST, after Doppler radar and automated rain gauges detected heavy rainfall falling at a rate of up to 1 to 2 inches per hour. The warning was extended multiple times throughout the day, with the latest extension lasting until 8:45 p.m. that day.
The heavy rain caused rapid rises in water levels at the Hanalei River and South Fork Wailua River, leading to ongoing or imminent flash flooding in streams, roads, and low-lying areas. Kuhio Highway near the Hanalei Bridge was closed due to floodwaters as early as 12:45 p.m., and the closure remained in effect throughout the day. The National Weather Service also issued a special marine statement warning of waterspouts and wind gusts of 34 knots or greater in Kauai’s leeward waters.
Who is affected
Residents and visitors in Kauai, particularly those near the Hanalei Bridge, South Fork Wailua River, and eastern slopes of the island, were directly affected by the flash flood warning. Communities along Kuhio Highway faced road closures, while campers and hikers were advised to avoid streams and creeks due to the risk of flooding. A community-led refuge area at Hale Halawai in Hanalei was opened as a last-resort evacuation option for those displaced by the flooding.
Oahu was also impacted, with a flood advisory issued for windward areas including Kaneohe, Ahuimanu, Kahaluu, Marine Corps Base Hawaii-Kaneohe, Waiahole, Maunawili, Kailua, Waikane, Manoa, Waimanalo, and Kaaawa. Minor flooding was expected in these areas due to heavy rain over the Koolau mountains.
Timeline of flood watch
- October 29, 2026: A statewide Flood Watch was issued for heavy rainfall in Maui County, with potential impacts extending into October 30 and 31. The Flash Flood Warning for East Maui and a Flood Watch for Maui County expired at 10:00 p.m. HST after periods of heavy rain, rockfalls, and road closures.
- October 31, 2026, 12:09 p.m. HST: The National Weather Service issued a flash flood warning for Kauai, citing rainfall rates of up to 1 to 2 inches per hour. Kuhio Highway near the Hanalei Bridge was closed due to floodwaters.
- October 31, 2026, 1:20 p.m. Flooding was expected near the Hanalei Bridge and the mouth of the Wailua River.
- October 31, 2026, 2:19 p.m. HST: The warning was extended again until 5:45 p.m., with rainfall rates remaining at 1 to 2 inches per hour. A special marine statement warned of waterspouts and wind gusts in Kauai’s leeward waters.
- October 31, 2026, 4:24 p.m. HST: The warning was extended until 8:45 p.m., with ongoing heavy rain and elevated stream gauges. The Hanalei Bridge closure remained in effect.
- October 31, 2026, 5:08 p.m. HST: The warning was extended for the final time, with rainfall rates still at 1 to 2 inches per hour. The warning expired at 8:45 p.m. HST.
What to do next
Residents and visitors should avoid crossing fast-flowing or rising water in vehicles or on foot. The Kauaʻi Emergency Management Agency advises sheltering in place if your home or structure is sound and outside flood-prone areas. For real-time updates, call the National Weather Service automated weather line at 808-245-6001 or visit weather.gov/hfo. To sign up for emergency notifications, visit kauai.gov/KEMA or text “KAUAIEMA” to 888777.
For road conditions and closures, call 808-241-1725. Avoid calling 911 unless you have an emergency. Campers and hikers should avoid streams or creeks entirely. If evacuation becomes necessary, the community-led refuge area at Hale Halawai in Hanalei is open, though it does not provide food, water, bedding, medications, personal caregivers, or medical staff.
What we know and don’t know
We also know the National Weather Service issued a special marine statement warning of waterspouts and wind gusts in Kauai’s leeward waters.
However, we do not have specific figures on the total rainfall accumulation over the entire event, the exact number of road closures beyond Kuhio Highway near the Hanalei Bridge, or the financial or infrastructure damage caused by the flooding. Additionally, there is no information on whether any injuries or fatalities occurred as a result of the flash flooding.
Why it matters
Flash flooding poses significant risks to life and property, particularly in areas with steep terrain and narrow streams like those on Kauai. The rapid rise in water levels can overwhelm drainage systems, cause road closures, and force evacuations. For residents and visitors, understanding the risks and taking precautions—such as avoiding flood-prone areas and staying informed through official alerts—can prevent injuries and property damage.
The extended flash flood warning highlights the importance of preparedness in Hawaii’s volatile weather patterns. With heavy rainfall events becoming more frequent, communities must remain vigilant and responsive to ensure public safety during such events.
- Monitor real-time updates from the National Weather Service or call their automated line at 808-245-6001.
- Avoid crossing fast-flowing or rising water, even in vehicles.
- If evacuation is necessary, use designated refuge areas like Hale Halawai in Hanalei, but bring your own supplies.
- Sign up for emergency notifications via kauai.gov/KEMA or text “KAUAIEMA” to 808-241-1800.
- Check road conditions by calling 808-241-1725 and avoid calling 911 unless it is an emergency.
Frequently asked questions
What is the difference between a flash flood warning and a flood advisory?
A flash flood warning means flash flooding is imminent or occurring in specific areas, such as streams, roads, and low-lying areas. A flood advisory, like the one issued for Oahu on October 31, 2026, indicates that minor flooding is expected but not necessarily imminent. Flood advisories are typically issued for longer durations and broader areas.
How can I stay safe during a flash flood?
Stay informed through official alerts from the National Weather Service or local emergency management agencies. Avoid crossing fast-flowing or rising water, even in vehicles. If you are in a flood-prone area, move to higher ground immediately. If evacuation is necessary, use designated refuge areas and bring your own supplies, as they will not be provided.
Why was the Hanalei Bridge closed?
The Hanalei Bridge was closed on October 31, 2026, due to rapid rises in water levels along the Hanalei River, which caused flooding on Kuhio Highway. The closure remained in effect throughout the day as the flash flood warning persisted.
Are there any evacuation points open on Kauai?
Yes, a community-led refuge area at Hale Halawai in Hanalei was opened as a last-resort evacuation option. However, it does not provide food, water, bedding, medications, personal caregivers, or medical staff, so anyone using it should bring their own supplies.
How can I get real-time updates on road conditions?
For real-time updates on road conditions and closures, call 808-241-1725. You can also visit the Kauaʻi Emergency Management Agency website or sign up for emergency notifications via text or email.
What should I do if I am camping or hiking during a flash flood warning?
Campers and hikers should avoid streams or creeks entirely during a flash flood warning. Move to higher ground immediately if you are in a flood-prone area. Stay away from riverbanks and avoid crossing flooded roads or streams.
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Sources
- First Alert Weather: Flash flood warning extended for Kauai, flood advisory issued for Oahu — hawaiinewsnow.com, 2026-10-31
- Flash flood warning extended again for Kauai as heavy showers persist — staradvertiser.com, 2026-10-31
- Flood Watch expires after periods of heavy rain, rockfalls, and road closures in East Maui and ʻĪao — mauinow.com, 2026-10-29
Primary sources referenced in this coverage: https://www.weather.gov/hfo?utm_medium=email&utm_source=govdelivery, https://www.kauai.gov/KEMA, http://www.mauicounty.gov/genasys, http://www.mauicounty.gov/parks, https://www.weather.gov/hfo/, https://mauicounty.gov/MEMA.
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