Costa Rica declared a green alert on Thursday as the Turrialba volcano, in the central province of Cartago, continued to spew out ash. /CFP Photo

Located east of the capital San José, Turrialba has seen continuous eruptions over the past two weeks. The Turrialba Volcano National Park has been closed since 2014 due to an increase involcanic activity. /CFP Photo

On Wednesday, cars and buildings in San Jose were covered with ash. Flights to and from the capital were also delayed or canceled. /CFP Photo

The green alert, the lowest level alert, calls for local emergency commissions to prepare to respond if needed, and to raise residents’ vigilance. /CFP Photo