Volcanic Threats: Popocatepetl, Etna, and Nyamulaira.

Active volcanoes in Italy, Mexico, and the Democratic Republic of Congo have prompted ash warnings and caused temporary airport closures. Mount Etna in Italy showered ash over Catania and forced airport operations to be suspended. Mexico City's largest airport was briefly closed due to ash from Volcano Popocatépetl, which also prompted officials to urge people to avoid traveling near it. The Nyamulagira volcano in the Democratic Republic of Congo continued ongoing activity and lava flow. There are nearly 50 active volcanoes around the world.