Flash Flood Warning Issued for Oahu as Heavy Rain Triggers Road Closures
The National Weather Service has issued a Flash Flood Warning for Oahu until 8:45 AM HST after reports of flooding in Wahiawa and the closure of Kapaa Quarry Road in Kailua.
Alert Details
The National Weather Service in Honolulu has issued a Flash Flood Warning for the island of Oahu in Honolulu County. The alert was issued at 7:16 AM HST on March 12, 2026, following reports of active flooding.
Affected Areas
This warning includes the entire island of Oahu. Specific impacts have already been reported by emergency management, including flooding near residences in the Wahiawa area and the closure of Kapaa Quarry Road in Kailua due to water flooding the roadway.
What You Should Do
Residents and visitors are urged to stay away from streams, rivers, drainage ditches, and culverts, even if they are currently dry. Excessive runoff from heavy rainfall will cause flooding of drainage ditches and streams, streets, highways, properties, and other low-lying spots. Do not attempt to cross flooded roads and be aware that landslides are possible in steep terrain.
Expected Conditions
Heavy rain is moving over the island from the southwest, with observed rainfall rates of 2 to 3 inches per hour. The National Weather Service expects additional periods of heavy rain and thunderstorms throughout the day. Hazards include flash flooding in drainages, streams, rivers, roads, and other low-lying areas.
Timeline
The Flash Flood Warning is effective immediately and is currently scheduled to expire at 8:45 AM HST on March 12, 2026.
Source: NOAA Official Notice
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