YOGYAKARTA, Indonesia, Nov. 30 (Xinhua) -- Heavy rains washed volcanic materials in the slope of Mount Merapi volcano and triggered floods that forced hundreds of people to flee homes.
Code River in Yogyakarta carrying ash and volcanic materials overflowed after the rains and submerged houses by up to the roof.
Disaster Management and Mitigation Management Agency official named only Rusdiayanto said that most of the ash and volcanic materials washed by the river were already existed in the river during the recent eruption.
"The residents must leave their houses for temporary, the waters had submerged their houses," he told Xinhua.
He said that more than 400 people fled homes on Tuesday and some of them had returned homes as the waters has receded.
"Some of them have come back and cleaned their houses this afternoon (Tuesday)," he said.
Mount Merapi had frequently erupted since Oct. 26 and it volcanic intensity has declined recently, but the seismic intensity is still high, which make the volcanologist still impose red alert.
The eruption has killed 347 people and had displaced over 400, 000 others.
Mount Merapi is one of Indonesia's 129 active volcanoes.