Rain-triggered floods and landslides Monday swept away 31 homes and buried others in villages around Ambon, the Jakarta Globe reported Tuesday.
The bodies of eight residents were found.
The torrential rains came less than a week after a downpour caused an earthen dam to collapse, killing one person and forcing thousands to flee their low-lying villages.
Crews were still repairing the dam when the newest round of rain began, said Sutopo Purwo Nugroho, spokesman for the National Disaster Mitigation Agency.
The latest deluge comes at the peak of the rainy season, which continues until the end of August.
Wisconsin business offering 'therapeutic cuddling' forced to close
Britney Spears debuts 'Perfume' video