As a voggy haze generated by the ongoing eruption of Kilauea volcano covers most of the Hawaiian Islands, Civil Defense has issued a health warning for areas closest to the source.

Officials are advising residents of South Hilo, Upper Puna and from Kea'au to Volcano to limit exposure to the haze known locally as vog.

The Code Yellow condition warns residents in those areas who are especially sensitive to air pollution to avoid outdoor activity.

A Code Green warning was in effect for other Big Island districts for low levels of vog which do not pose health risks.

No risk is reported for any other island.

The National Weather Service reported hazy conditions for every island zone except the breezy summits of Haleakala on Maui and Mauna Kea on the Big Island.