Urgent Flood Watch Today: Meteorologists Warn of Life-Threatening Flash Floods—Safety Tips & Live Updates

A Flood Watch is now in effect for every Hawaiian Island as a slow-moving upper-level trough pulls deep tropical moisture over the state, setting the stage for several rounds of torrential rain through Thursday, October 29, 2026. Forecasters at the National Weather Service warn that showers will become increasingly widespread and locally intense, with hourly rainfall rates topping two inches possible during embedded thunderstorms. Urban Honolulu, windward Oʻahu, Hilo, and low-lying areas of Maui and Kauaʻi are especially vulnerable to rapid water rise in streets, streams, and gulches. Key impacts to watch: • Flash flooding: Small streams may overflow with little notice, cutting off roadways and isolating communities. • Landslides: Saturated slopes on the Hāmākua Coast, East Maui, and the Na Pali cliffs could trigger rockfall and debris slides. • Coastal surge: High astronomical tides combined with wave run-up may push water onto shorelines during peak onshore bursts. Travel and safety tips: 1. Never drive across water-covered roads; just 12 inches of flowing water can sweep away most vehicles. 2. Keep phones charged and have battery-powered alerts enabled for sudden Flash Flood Warnings. 3. Campers and hikers should relocate now from stream beds and valleys that can funnel runoff. 4. Airline passengers should monitor carrier updates; temporary runway ponding and lightning delays are possible at Honolulu and Kahului airports. Rainfall is expected to taper Friday as the trough lifts north, but soils will stay saturated—so additional Flood Advisories remain possible this weekend if showers redevelop. Residents are urged to review emergency plans and stock up on essentials before the heaviest downpours arrive tonight.