Kauaʻi County, including Kauaʻi and Niʻihau, is under a hurricane warning, with hurricane conditions expected Monday night. The Big Island faces risks of flash flooding, mudslides, and coastal impacts due to high surf and heavy rain. Maui and Oʻahu are also under a flood watch, with rainfall totals of 2 to 5 inches and isolated maximums of 10 inches. Coastal properties, roadways, and harbor entrances may experience significant damage from surging ocean water and strong currents. Tornadoes pose an additional risk, particularly near Kauaʻi and Niʻihau.