JAKARTA, Indonesia — Indonesia's highest volcano on its most densely populated island released searing gas clouds and rivers of lava Sunday in its latest eruption. Monsoon rains eroded and finally collapsed the lava dome atop 3,676-meter (12,060-foot) Mount Semeru, causing the eruption, according to National Disaster Management Agency spokesperson Abdul Muhari. Several villages were blanketed with falling ash, blocking out the sun, but no casualties have been reported. Several hundred residents, their faces smeared with volcanic dust and rain, fled to temporary shelters or left for other safe areas. Thick columns of ash were blasted more than 1,500 meters (nearly...