Photos: Mexico’s Popocatepetl volcano Erupts

A cloud of ash belches out of Mexico's Popocatepetl volcano, some 55 km from Mexico City, as seen from Cholula, in the Mexican central state of Puebla, on May 15, 2013. The volcano spewed a new column of ash late Tuesday, with some of the material falling on three towns while glowing rocks landed on the towering mountain's slope. Authorities have raised the alert level to "Yellow Phase Three," the fifth of a seven-stage warning system, restricting access to an area of 12 km around the volcano while preparing evacuation routes and shelters. ARTURO ANDRADE/AFP/Getty Images ( 519741166 )

A man walks in Santiago Xalitzintla community near Popocatepetl volcano, in Puebla, Mexico, on May 13, 2013. According to a report by the National Center of Prevention of Disasters (CENAPRED) the yellow alert phase three is still in force. Ronaldo Schemidt/AFP/Getty Images ( 519695438 )

Clouds of ash and smoke are spewed from the Popocatepetl Volcano as seen from Santiago Xalitxintla, in Puebla, Mexico, on May 13, 2013. According to a report by the National Center of Prevention of Disasters (CENAPRED) the yellow alert phase three is still in force. Ronaldo Schemidt/AFP/Getty Images ( 519696905 )

Clouds of ash and smoke are spewed from the Popocatepetl Volcano as seen from Santiago Xalitxintla, in Puebla, Mexico, on May 13, 2013. According to a report by the National Center of Prevention of Disasters (CENAPRED) the yellow alert phase three is still in force. Ronaldo Schemidt/AFP/Getty Images ( 519697644 )

View of Santiago Xalitxintla community with the Popocatepetl Volcano on the background, in Puebla, Mexico, on May 13, 2013. According to a report by the National Center of Prevention of Disasters (CENAPRED) the yellow alert phase three is still in force. Ronaldo Schemidt/AFP/Getty Images ( 519698167 )

The Popocatepetl Volcano, Mexico's second highest peak just 55 km southeast of Mexico City, is seen from Santiago Xalitxintla, in Puebla, on May 14, 2013 spewing a cloud of ash and smoke. The National Disaster Prevention Centre (CENAPRED) raised the alert level on Sunday to "yellow phase three". Ronaldo Schemidt/AFP/Getty Images ( 519711040 )

The Popocatepetl Volcano, Mexico's second highest peak just 55 km southeast of Mexico City, is seen from Santiago Xalitxintla, in Puebla, on May 14, 2013 spewing a cloud of ash and smoke. The National Disaster Prevention Centre (CENAPRED) raised the alert level on Sunday to "yellow phase three". Ronaldo Schemidt/AFP/Getty Images ( 519711417 )

Backdropped by Popocatepetl Volcano, Mexico's second highest peak just 55 km southeast of Mexico City, a farner plows the land in San Nicolas de los Ranchos, in the state of Puebla, on May 14, 2013. The National Disaster Prevention Centre (CENAPRED) raised the alert level on Sunday to "yellow phase three" as the Popocatepetl continues to spew ash and smoke. Ronaldo Schemidt/AFP/Getty Images ( 519711766 )

A cloud of ash belches out of Mexico's Popocatepetl volcano, some 55 km from Mexico City, as seen from Cholula, in the Mexican central state of Puebla, on May 15, 2013. The volcano spewed a new column of ash late Tuesday, with some of the material falling on three towns while glowing rocks landed on the towering mountain's slope. Authorities have raised the alert level to "Yellow Phase Three," the fifth of a seven-stage warning system, restricting access to an area of 12 km around the volcano while preparing evacuation routes and shelters. ARTURO ANDRADE/AFP/Getty Images ( 519741172 )