puebla

The snow-covered Popocatepetl volcano spews a cloud of steam high into the air in Puebla...The snow-covered Popocatepetl volcano spews a cloud of steam high into the air in Puebla July 7, 2013. Mexican authorities raised the alert level for the Popocatepetl volcano on Saturday after an increased level of explosive activity belched ash over Mexico City and pushed international airlines to suspend flights.The alert level for the towering Popocatepetl volcano, located some 50 miles (80 km) to the southeast of the capital, was raised to yellow phase three from yellow phase two, Mexico's National Center for Disaster Prevention said in a statement. REUTERS/Imelda Medina (MEXICO - Tags: ENVIRONMENT TPX IMAGES OF THE DAY)

Imelda Medina/Reuters

The snow covered Popocatepetl volcano spews a cloud of steam high into the air in Puebla, Mexico, on Sunday. Mexican authorities raised the alert level for the Popocatepetl volcano on Saturday after an increased amount of explosive activity belched ash over Mexico City and pushed international airlines to suspend flights. The alert level for the towering Popocatepetl volcano, which is 50 miles (80km) to the southeast of the capital, was raised to yellow phase three from yellow phase two, Mexico’s National Center for Disaster Prevention said 

Smoke rises from the Popocatepetl as it spews incandescent volcanic material on the outskirts of Puebla July 4, 2013. The 5,450-metre (17,900 ft) Popocatepetl volcano has been kept on yellow phase two alert, the second-highest warning on the center's seven-step scale, according to local media.

melda Medina/Reuters

Smoke rises from the Popocat├ępetl volcano as it spews incandescent volcanic material on the outskirts of Puebla, Mexico on Thursday.

A cloud of ash belches out of Mexico's P...A cloud of ash belches out of Mexico's Popocatepetl volcano, some 55 km from Mexico City, as seen from Paso de Cortes, in the Mexican central state of Puebla, on May 20, 2013. 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. AFP PHOTO/Arturo AndradeARTURO ANDRADE/AFP/Getty Images

Arturo Andrade/AFP

A cloud of ash belches out of Mexico’s Popocatepetl volcano, about 55km from Mexico City, as seen from Paso de Cortes, in the Mexican central state of Puebla. Authorities have raised the alert level to “yellow phase three”, the fifth of a seven-stage warning system, restricting access to an area of 12km around the volcano while preparing evacuation routes and shelters. 

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

A farmer ploughs the land in San Nicolas de los Ranchos, in the state of Puebla, with the Popocatepetl volcano, Mexico’s second-highest peak, 55km southeast of Mexico City, in the background. The National Disaster Prevention Centre raised the alert level to ‘yellow phase three’, as the Popocatepetl continues to spew ash and smoke.