The Popocatépetl volcano spews a cloud of ash high into the air. The picture was taken from a plane during a flight to Mexico City, Mexico, on October 18, 2019. /VCG Photo

Sitting between the states of Morelos and Puebla, Popocatépetl was dormant for decades until its eruption in 1994. Since then, its rumblings have become a part of daily life for residents. /VCG Photo