Residents line up to receive a protection kit in case of ash fall in the village of Santiago Xalitzintla in Puebla state, Mexico on May 23, 2023, following an increase in the activity of the Popocatepetl volcano. Mexican authorities on May 21 raised the warning level for the Popocatepetl volcano to one step below red alert, as smoke, ash, and molten rock spewed into the sky posing risks to aviation and far-flung communities below. Sunday's increased alert level -- to "yellow phase three" -- comes a day after two Mexico City airports temporarily halted operations due to falling ash. (Photo by CLAUDIO CRUZ / AFP)