Severe

Significant threat to life or property

Flash Flood Warning Severe Hawaii | Effective 03-20-2026 13:54

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> FFWHFO The National Weather Service in Honolulu has extended the * Flash Flood Warning for...<br /> The island of Oahu in Honolulu County * Until 200 PM HST. * At 1054 AM HST, additional water continued to run off into the<br /> Wahiawa Reservoir and area streams keeping water levels elevated.<br /> Flood impacts from earlier rainfall are ongoing. Despite a lull in<br /> rainfall at this time, additional areas of heavy rain are expected<br />

Flash Flood Warning Severe Hawaii | Effective 03-20-2026 10:43

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> FFWHFO The National Weather Service in Honolulu has extended the * Flash Flood Warning for...<br /> The island of Oahu in Honolulu County * Until 1100 AM HST. * At 743 AM HST, emergency management reported widespread<br /> life-threatening flash flooding effects continuing across northern<br /> Oahu, particularly in the Haleiwa and Waialua areas. Although<br /> rainfall rates have temporarily decreased, significant runoff<br />

Flash Flood Warning Severe Hawaii | Effective 03-20-2026 07:53

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> FFWHFO The National Weather Service in Honolulu has extended the * Flash Flood Warning for...<br /> The island of Oahu in Honolulu County * Until 800 AM HST. * At 453 AM HST, emergency management reported life-threatening<br /> flash flooding across northern Oahu, particularly in the Haleiwa<br /> and Waialua areas. Floodwaters have cut off road access in and out<br /> of Haleiwa, and widespread flooding of roadways and low-lying<br />

Flash Flood Warning Severe Hawaii | Effective 03-20-2026 06:16

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> ...FLASH FLOOD WARNING REMAINS IN EFFECT UNTIL 5 AM HST EARLY THIS<br /> MORNING FOR THE ISLAND OF OAHU IN HONOLULU COUNTY... At 316 AM HST, emergency management reported life-threatening flash<br /> flooding across northern Oahu, particularly in the Haleiwa and<br /> Waialua areas. Floodwaters have cut off road access in and out of<br /> Haleiwa, and widespread flooding of roadways and low-lying areas is<br />

Flash Flood Warning Severe Hawaii | Effective 03-20-2026 04:53

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> FFWHFO The National Weather Service in Honolulu has extended the * Flash Flood Warning for...<br /> The island of Oahu in Honolulu County * Until 500 AM HST. * At 153 AM HST, emergency management reported heavy rain and<br /> widespread flooding across northern Oahu this morning. Currently,<br /> there is no road access in or out of Haleiwa due to high flood<br /> waters. Although rainfall rates have decreased over the area,<br />

Flash Flood Warning Severe Hawaii | Effective 03-20-2026 02:39

Public safety alert, emergency alert, and weather alert<br /> Description:<br /> At 1139 PM HST, radar and rain gauges indicated heavy rain falling<br /> over the northern half of Oahu. Rain was falling at a rate of 1 to 3<br /> inches per hour. Flash flooding is ongoing potentially making<br /> roadways impassable. Flooding conditions will rapidly worsen as<br /> additional heavy rain continues to fall over the next hour. Oahu<br /> Emergency Management officials are reporting streams and drainages<br />
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