Tens of thousands of people stayed put near Mount Agung after an alert was raised to its highest level.
Some still felt safe while others did not want to leave livestock.
A spokesman for the country's National Disaster Management Agency (BNPB) said people were checking the exclusion zone for non-evacuees.
"There are personnel doing the sweeping, if they [residents] need to be forcibly evacuated," Sutopo Purwo Nugroho said.
The island's airport has now closed, leaving thousands stranded in the tourist hotspot.