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Heavy rain, coastal erosion compound flooding threats in Java

Persistent heavy rainfall across West and Central Java has triggered flooding and landslides with coastal areas bearing the greatest impact due to ongoing erosion. The situation is expected to continue in the coming days.

Gembong Hanung (The Jakarta Post)
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Tue, January 13, 2026 Published on Jan. 13, 2026 Published on 2026-01-13T16:54:32+07:00

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Residents inspect a taxi stranded by floodwaters on Jan. 12 in the Duta Bandara Permai housing complex, Kosambi, Tangerang Regency, Banten. According to the Tangerang Regency Regional Disaster Management Agency (BPBD), floods affected six sub-districts with water levels ranging from 30 to 140 centimeters, impacting approximately 1,014 households. Residents inspect a taxi stranded by floodwaters on Jan. 12 in the Duta Bandara Permai housing complex, Kosambi, Tangerang Regency, Banten. According to the Tangerang Regency Regional Disaster Management Agency (BPBD), floods affected six sub-districts with water levels ranging from 30 to 140 centimeters, impacting approximately 1,014 households. (Antara/Putra M. Akbar)

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looding and landslides have struck parts of Java amid persistent rainfall, with coastal areas bearing the brunt due to ongoing erosion, and conditions are forecast to deteriorate further.

The Meteorology, Climatology and Geophysics Agency (BMKG) has issued an “alert period” from Jan. 13 to 15 for several regions, particularly West and Central Java, warning of torrential rain, thunderstorms and strong winds.

Several northern coastal areas of Java have already been inundated following heavy downpour over the past few days.

As of Tuesday, six villages and three subdistricts in Demak, Central Java, remained flooded, with water reaching 50 centimeters in depth.

The Demak Disaster Mitigation Agency (BPBD) reported that the worst-hit district of Sayung records at least 520 affected residents across two villages, namely Sayung and Kalisari.

Read also: Sitaro regency applies recovery scheme, relocation plans after flash floods

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Located south of the Java Sea, the district has long suffered from coastal erosion, making it more vulnerable to flooding from both rain and seawater.

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