Big Island Flood Advisory: Heavy Rain and Potential Hazards (2026)

Flash Flood Alert: Big Island's Southeast Under Threat

The National Weather Service in Honolulu has issued an extended flood advisory for the southeast region of the Big Island, with heavy rainfall causing widespread concerns. This advisory, initially set to expire at 10:45 a.m., has now been extended to 1:45 p.m. on January 4, 2026.

But here's where it gets controversial: the radar at 10:30 a.m. indicated that the heavy rain, falling at an alarming rate of up to 3 inches per hour in certain areas, is still moving over the Puna and Ka'ū coasts. This excessive rainfall is causing flooding in multiple locations, including Hilo, Hawai'i Volcanoes National Park, and several other communities.

Some of the areas expected to remain flooded include Volcano, Glenwood, and Mountain View, with poor drainage areas and streams also at risk. And this is the part most people miss: even low-water crossings can become impassable, posing a significant threat to drivers and residents.

The National Weather Service forecasters have emphasized the need for the public to stay away from streams, drainage ditches, and low-lying areas prone to flooding. A flood watch remains in effect for the entire state until Monday afternoon, highlighting the ongoing risk.

So, what do you think? Is this an overreaction to a typical tropical storm, or are these measures necessary to ensure public safety? We'd love to hear your thoughts in the comments below!

Big Island Flood Advisory: Heavy Rain and Potential Hazards (2026)
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