On Kauai, the lavas and other volcanic material from this stage have been called the Koloa Volcanics. Although the Koloa, Makaweli, and Napali volcanoes are probably dead, volcanic hazards do affect the island.
Volcanoes spew noxious plumes of acidic gases.
The resulting vog and laze effect many communities across Kauai County. When a volcanic erupts, sulfur dioxide within the molten rock is converted to sulfuric acid. Gases are also produced at the ocean. Both of these gases can contain particulate matter, such as volcanic glass or trace metals. Vog and laze are carried by winds across the county.