Guatemala remained on alert Tuesday after evacuating villages during an eruption of the Fuego volcano, one of Central America’s most active. About 1,700 people remained in shelters with the evacuations to stay in place until conditions improve, according to the country’s disaster agency CONRED. Officials raised the alert level to red in Sacatepequez, Escuintla and Chimaltenango, where about 29,000 people are affected by ashfall and schools remain closed. Claudinne Ogaldes, executive secretary of CONRED, recommended residents in the three municipalities cover their water deposits and use face masks as protection from ash. The eruption started Monday morning, with clouds of gas and ash rising above the volcano as lava and pyroclastic flows rolled down the slopes.