Update: Red flag warning previously in effect for most of Big Island canceled

Update at 7:37 a.m. Oct. 25, 2025: National Weather Service forecasters in Honolulu canceled the red flag warning that was in effect for much of the Big Island, including North and South Kohala as well as portions of North Kona, Kaʻū, Puna and Hāmākua.

Increasing moisture associated with a passing upper-level disturbance will decrease critical fire weather conditions over the islands of Maui County and the Big Island.

Red flag warning conditions will continue today, however, for leeward areas of Niʻihai, Kauaʻi and Oʻahu, with relative humidities forecast to be about 45% or lower within those areas through this afternoon.

A winter weather advisory also is sill in effect for the summits of Mauna Kea and Mauna Loa.

Hawai’i County Civil Defense advises that the windward districts of North Kohala, Hāmākua, Hilo, Puna and the island Interiors could experience thunderstorms.

Be aware for flooding and lightning in these areas.

Original post at 9:35 a.m. Oct. 23, 2025: The National Weather Service in Honolulu has issued a red flag warning for most areas across Hawaiʻi as dry and windy conditions raise the risk of wildfires through Saturday evening.

Forecasters say strong trade winds and low humidity are combining to create critical fire weather conditions — especially this afternoon and again late Friday and Saturday.

The warning replaces the earlier fire weather watch and will remain in effect from noon Thursday to 6 p.m. Saturday. The affected areas include the leeward portions of all islands, as well as the Kohala region and the interior of the Big Island. 

Winds are expected to increase through the weekend, with gusts reaching up to 50 miles per hour on Friday. Relative humidity could drop as low as 40%, drying vegetation and heightening the risk for fast-moving fires.

The National Weather Service cautions that any fires that develop will likely spread rapidly, urging residents to avoid outdoor burning and to report any signs of smoke or fire immediately.

Officials remind residents that a Red Flag Warning does not predict new fires, but signals conditions where even small sparks can lead to dangerous fire behavior.

Due to these conditions, the Hawaiʻi County Civil Defense Agency recommends avoiding activities involving open flames, such as grilling or campfires.

The agency also advises against parking vehicles on dry grass after an outing.

For weather updates, call the National Weather Service automated weather line at 808-245-6001 or visit the National Weather Service Honolulu forecast office website.

Visit the National Weather Service Honolulu forecast office website for the latest weather updates, advisories, watches, and warnings.