Mexico wakes up with an eye on the Popocatépetl volcano, where the volcanic traffic light increased its intensity to 'Yellow Phase 3' The volcano activity increased significantly in the last three days and will cause closures of activities at airports, suspension of face-to-face classes and excessive ash fall throughout central Mexico. "It's normal and nature has to pick up the bill for everything we've polluted and I think it's part of the earth's natural cycle, not fear," one resident said.