"It's a natural phenomenon affected by climate change. It's been made worse by negligent behaviour," said Masnellyarty Hilman, a deputy environment minister in charge of drafting a national strategy to deal with climate change.
She said warmer seas had heated up monsoon winds that carry moisture from the ocean to the land, leading to extra heavy rain.
"According the meteorology agency, rainfall was at up to 250 millimetres on Thursday and Friday. It was an extreme phenomenon."
Indonesia is developing a strategy to deal with climate change and will submit the draft to the United Nations Framework Convention on Climate Change (UNFCCC) this month.
Global Warning Climate Change Flooding Indonesia Kyoto Energy