Volcano-watchers gather on an overlooking vantage point as lava erupts from the Piton de la Fournaise "Peak of the Furnace" volcano, on the southeastern corner of the Indian Ocean island of Reunion Saturday, Aug. 1, 2015 (AP)
Volcanologists take photographs of themselves and the volcano as they stand in a field of cooled volcanic rock, as lava erupts nearby from the Piton de la Fournaise "Peak of the Furnace" volcano, on the southeastern corner of the Indian Ocean island of Reunion Saturday, Aug. 1, 2015 (AP)
A helicopter passes over a waterfall on the forested lower slopes of the Piton de la Fournaise "Peak of the Furnace" volcano, on the southeastern corner of the Indian Ocean island of Reunion Saturday, Aug. 1, 2015 (AP)
A helicopter flies over as lava erupts from the Piton de la Fournaise "Peak of the Furnace" volcano, on the southeastern corner of the Indian Ocean island of Reunion Saturday, Aug. 1, 2015 (AP)
Lava erupts from the Piton de la Fournaise "Peak of the Furnace" volcano, on the southeastern corner of the Indian Ocean island of Reunion Saturday, Aug. 1, 2015 (AP)
A helicopter flies past as lava erupts from the Piton de la Fournaise "Peak of the Furnace" volcano, on the southeastern corner of the Indian Ocean island of Reunion Saturday, Aug. 1, 2015 (AP)