Hawaii urges residents to ‘leave now' amid worst flooding in over 20 years The GuardianThousands evacuated as Hawaii faces worst flooding in 20 years BBCGov. Green: National Guard adds ‘extra eyes' at Wahiawa Dam as levels stabilize Hawaii News NowFlood watch in effect as more rain looms over Hawai?i Hawaii Public RadioHawaii's worst flooding in 20 years threatens dam, prompts evacuations as more rain looms NBC News