Indonesia warned Tuesday regional authorities in the islands of Java and Madura to take preventive measures and make preparations on the possibility of floods or landslide during the wet season from October to January.
Indonesian Minister of Forestry Malam Sambat Kaban told reporters that most of the areas in the islands were vulnerable from natural disaster, as the quality of forest in their areas decreased significantly.
"There is an early warning to all the governors and heads of reagent in the islands of Java and Madura," he said.
The minister made an example that only 16 percent of the area in Java island was forest area, but of the forest area only 67 percent was well covered.
"There are about 856,000 hectares in Java and Madura are vulnerable of disasters," The minister said. There are 5,073 villages around and include in the areas, he added.
"If a heavy rain comes, the villages are potential of being hit by landslide or flood," he said.
Indonesia has frequently experienced floods and landslides caused by tropical downpour recently, that killed hundreds of people and destroyed infrastructure.
Rampant deforestation was mostly caused by illegal logging and opening new plantation often triggered the catastrophes.