Hawaii Lava Flow

In this Monday, Aug. 8, 2016 photo, lava from Kilauea, an active volcano on Hawaii’s Big Island, flows toward the ocean in Volcanoes National Park near Kalapana, Hawaii.

In this Monday, Aug. 8, 2016 photo, visitors look at lava from Kilauea, an active volcano on Hawaii’s Big Island, as it flows toward the ocean in Volcanoes National Park near Kalapana, Hawaii.

In this Tuesday, Aug. 9, 2016 photo, lava from Kilauea, an active volcano on Hawaii’s Big Island, flows into the ocean as seen from a boat operated by Lava Ocean Tours off the coast of Volcanoes National Park near Kalapana, Hawaii.

In this Monday, Aug. 8, 2016 photo, hardened lava rock from Kilauea, an active volcano on Hawaii’s Big Island, is shown in Volcanoes National Park near Kalapana, Hawaii. The current lava flow erupted from a vent on the volcano in May and made its way to the sea in late July. Visitors can hike about 10 miles round trip to see the lava, or take a boat or helicopter tour to see the flow.