At least 34 killed in Indonesia volcano eruption as rain and lava hamper search for the 22 missing

Heavy rains and torrents of hot lava and mud sliding down an erupting volcano on Indonesia's Java island have put search and rescue operations for more than a dozen missing on hold, officials said Wednesday.

Mount Semeru blew its top on Saturday, killing at least 34 people with searing ash and gas that blanketed several villages around it. Another 22 are still missing, according to the Center for Volcanology and Geological Hazard Mitigation 

"It is raining everyday. The situation on the slopes of Semeru requires high vigilance, there are signs of volcanic activity," said Irwan Subekti, commander of the Mount Semeru Disaster Emergency Response Command.

Hot lava from the top of the 12,060-foot mountain still flows down. Heavy rains that are believed to have triggered the eruption mixed with volcanic mud and flooded the villages covered by the ashfall. Roads were closed and houses buried in layers of mud up to 3.2 feet high.

The conditions were not suitable for heavy equipment, officials said. There had been no survivors found under the debris since Saturday, and Tholeb Vatelehan, spokesperson for the Surabaya Search and Rescue Agency, said that the death toll is expected to rise as more bodies are recovered.

More than 4,200 people were evacuated following Saturday's eruption to temporary shelters, and some are still being treated at hospitals in Lumajang district for burns and other injuries.

Semeru, also known as Mahameru, has erupted many times in the last 200 years. Still, as on many of the 129 volcanoes monitored in Indonesia, tens of thousands of people live on its fertile slopes. It last erupted in January, with no casualties.

Indonesia, an archipelago of more than 270 million people, is prone to earthquakes and volcanic activity because it sits along the Pacific "Ring of Fire," a horseshoe-shaped series of fault lines.