Puʻuhonua o Hōnaunau National Historical Park

Flash flooding is the clearest environmental hazard at Pu'uhonua o Hōnaunau, with nine recorded flood and flash flood events logged in Hawaii County's recent data. The park sits along the low-lying Kona Coast, where heavy rain can push water rapidly across lava flats and coastal trails with very little warning. Though no deaths or injuries were recorded in this dataset, flash floods on hardened volcanic terrain leave nowhere for water to drain slowly.

Before heading out, check the National Weather Service Honolulu forecast specifically for flash flood watches in South Kona — conditions can change within an hour. Wear secure, closed-toe shoes with grip suited for wet lava rock, which becomes dangerously slick during rain events. If you hear rushing water or see the sky darkening rapidly inland, move immediately to higher paved ground rather than sheltering near the shoreline or low trail sections.