Volcano threatens millions in Mexico
1 June 2012 Last updated at 05:00 BST
Mexico's Popocatepetl Volcano has blasted a tower of ash over nearby towns and villages prompting authorities to consider the possibility of evacuations.
Popocatepetl sits roughly halfway between Mexico City and the city of Puebla, meaning some 25 million people live within a 90-km (60-mile) radius of the volcano.
Over a month ago, the volcanic eruptions started growing larger.