The National Weather Service Honolulu office reported Moanalua Stream reaching a record stage exceeding its ~15-year record at approximately 6:45-7:15 PM UTC on February 21, 2026, prompting significant flooding expectations in Mapunapuna, Fort Shafter, Moanalua Gardens, and Moanalua Valley properties on Oahu due to ongoing torrential rains, according to their X post. NWSHonolulu warned residents to stay safe amid the flash flood update, building on earlier crowdsourced reports of flooding on Likelike Highway near the Wilson Tunnels and Kam Highway in Waiahole from 1.31 inches of rain near Waiahole between 6:16-6:45 PM UTC, as stated in prior NWS posts under the #TurnAroundDontDrown campaign. The agency continues to monitor heavy rainfall impacts across Oahu, with the record stream stage indicating escalated flooding risks in the specified valleys and communities during this 30-minute period.
