Despite at least two lava flows, Alejandro Maldonado, secretary of the disaster reduction office CONRAD, said the so-called "Fire Volcano" was not yet sufficiently dangerous to justify the evacuation of nearby villages.
Experts say the volcano -- one of the most active in Central America -- may become increasingly violent in the coming hours and could affect air traffic.
In February, a powerful eruption at Fuego forced authorities to declare an alert and close the airport in the capital.
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