(CNN) The death toll from flooding in the Indonesian capital of Jakarta has risen to 66, authorities say, with two people still missing after the megalopolis was hit by some of the most powerful monsoon rains seen in years.

And it could get worse. Though the floodwaters have somewhat subsided around Jakarta, heavy rain and thunderstorms are forecast in the days ahead. Jakarta and the central area of Java, Indonesia's most populous island, are expected to receive as much as 4 inches (102 mm) of rain in the next few days.

In the meantime, authorities and the Red Cross have started spraying the capital with disinfectant to stop the spread of waterborne diseases, said Agus Wibowo, a spokesman for the Indonesian National Disaster Mitigation Agency.

A man navigates an inflatable boat at a flooded neighborhood in Jakarta on Saturday.

Images from Jakarta's greater metropolitan area, which is home to about 30 million people, showed people wading through chest-high floodwaters and using inflatable rafts to navigate streets that had turned into rivers on the weekend.

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