Experts say another eruption from Hawaii's Kilauea volcano is imminent, as livestream footage shows lava beginning to flow from its summit this weekend.

The U.S. Geological Survey (USGS) issued a new orange "watch" alert for Hawaii's Kilauea volcano on Sunday, warning that the lava flows were increasing in duration and that "another fountaining episode is close" amid an ongoing eruption. Kilauea is one of the world's most active volcanoes.

Kilauea's most recent eruption drew in flocks of visitors. Here's what travelers should know about the natural spectacle.