The Volcano of Fire spewed lava and ash on Monday, as seen from Escuintla, Guatemala. Guatemalan authorities on Monday declared a red alert after the volcano erupted again, forcing thousands of residents to flee. Carlos Alonzo/AFP/Getty Images hide caption
Residents search for victims of the Fuego volcano eruption in the ash-covered village of San Miguel Los Lotes, in Escuintla, about 20 miles southwest of Guatemala City, on Thursday. Johan Ordonez/AFP/Getty Images hide caption
Lilian Hernandez cries as she is comforted by her husband at the Mormon church that has been enabled as a shelter near Escuintla, Guatemala, on Tuesday. Hernandez lost 36 family members in all, missing and presumed dead in the town of San Miguel Los Lotes after the fiery volcanic eruption of the Volcan de Fuego, or Volcano of Fire, in south-central Guatemala. Oliver de Ros/AP hide caption
People flee El Rodeo village, less than 30 miles from the capital, Guatemala City, after the eruption of the Fuego volcano on Sunday. Noe Perez/AFP/Getty Images hide caption
In this photo released by the U.S. Geological Survey, lava is shown burning in Leilani Estates subdivision near the town of Pahoa on Hawaii's Big Island on Thursday. U.S. Geological Survey via AP hide caption
Mount Agung volcano, seen at sunrise in Bali, Indonesia, could erupt soon, say authorities. Firdia Lisnawati/AP hide caption
Mount Paektu, which sits on the border with China, is known in North Korea as the "sacred mountain of revolution" and considered the legendary birthplace of Kim Jong Il and Korean culture. David Guttenfelder/AP hide caption
About 70 percent of Earth is covered by clouds at any given moment. Their interaction with climate isn't easy to study, scientists say; these shape-shifters move quickly. NOAA/Flickr hide caption
The Grand Prismatic hot spring in Yellowstone National Park is among the park's myriad hydrothermal features created by the fact that Yellowstone is a supervolcano. Robert B. Smith/AP hide caption
The eruption of Mount Pinatubo in the Philippines in 1991 spewed almost 20 million tons of sulfur dioxide into the atmosphere, causing worldwide temperatures to drop half a degree on average. Arlan Naeg/AFP/Getty Images hide caption
Mount Etna erupted on March 28, 1983. Lava flows destroyed homes and tourist destinations causing millions of dollars' worth of damage. Teams scrambled to divert the massive flow. Courtesy of John Lockwood hide caption
Lava near the leading edge of the flow oozes over a concrete slab and toward a tangerine tree before solidifying near the town of Pahoa on the Big Island of Hawaii earlier this week. U.S. Geological Survey/AP hide caption
A geologist maps the margin of the lava flow in the open field below Cemetery Road near the town of Pahoa on the Big Island of Hawaii. Dozens of residents from the village may be forced to evacuate. AP hide caption
A lava flow advances across the pasture between the Pahoa cemetery and Apaa Street, engulfing a barbed wire fence, near the town of Pahoa on the Big Island of Hawaii on Sunday. U.S. Geological Survey/AP hide caption