volcanos

Popocatépetl volcano spews incandescent material on Tuesday. The second highest volcano in the Mexico increased its activity, and authorities raised the alert to the second-highest level. Cristopher Rogel Blanquet/Getty Images hide caption

A yellow butterfly flies above a house covered by ash from the Taal Volcano in the town of Agoncillo in Batangas City on Monday. Dante Diosina Jr./Anadolu Agency via Getty Images hide caption

A rescue boat approaches New Zealand's White Island on Monday. A volcano on the island erupted, killing at least eight people. Michael Schade/AP hide caption

A view of the White Island volcanic eruption Monday off the coast of Whakatane, New Zealand. Health officials reported some patients received burns on at least 30% of their bodies. Lillani Hopkins/AP hide caption

The Chaparrastique volcano in eastern El Salvador erupted on Sunday. Hector Garay/Telenoticias 21/AFP/Getty Images hide caption

The sky glowed red above Sicily's Mount Etna early Wednesday. Salvatore Allegra/AP hide caption