Severe Flash Flood Warning Issued for Oahu, Hawaii Amid Heavy Rainfall

A Flash Flood Warning has been issued for Oahu, Hawaii, as heavy rainfall continues to affect the island. The National Weather Service warns of potential flooding in various communities, including downtown Honolulu and Waikiki. Residents are advised to stay away from streams and low-lying areas as the risk of flash flooding remains high. The warning is linked to a powerful Kona low storm system, expected to bring widespread flooding through March 14. Key infrastructure, including schools and hospitals, may also be impacted. Stay updated on safety measures and road closures.

By Narendra Chaudhary Mar 13, 2026, 05:21 IST

Flash Flood Alert for Oahu

The National Weather Service in Honolulu has issued a Flash Flood Warning for Oahu, Hawaii, as intense rainfall continues to affect various regions of the island. As of 1:37 PM HST on Thursday, the warning for Honolulu County remains in effect until 2:45 PM HST. Radar has identified areas of heavy rain moving north-northwest across the eastern sections of Oahu.

Locations such as downtown Honolulu and Waikiki are experiencing rainfall rates between 1 to 3 inches per hour. Meteorologists predict that additional heavy rain bands will sweep across the island in the coming hour, maintaining the risk of flash flooding. Authorities have cautioned that flooding may impact drainage systems, streams, rivers, roads, and properties situated in low-lying areas. Public road closures may also be necessary in certain regions, and landslides could occur in steep areas.

This warning encompasses the entire island of Oahu, with several communities at risk of flooding. Pearl City, Kailua, and Waipahu have been specifically noted as areas under the extended flash flood warning. The National Weather Service attributes the heavy rainfall to a significant Kona low storm system, which is anticipated to cause widespread flooding across parts of Hawaii until March 14.

The affected region includes densely populated urban areas on the leeward side of the island. A warning map released by officials indicates a high-risk zone affecting approximately 1,013,503 residents. The potential flooding could disrupt critical infrastructure, including 183 schools and 18 hospitals located within the risk area.

Residents are urged to avoid streams, rivers, drainage ditches, and culverts, even if they seem dry. Authorities have warned that excessive runoff from the heavy rainfall could rapidly result in flooding on streets, highways, and other low-lying areas.