Indonesia: Floods and Landslides - Jan 2021

Flood

Severity score20 / 100 · Watch

How the score is calculated

The score starts at 8. It adds points from recorded affected, deaths, displaced and casualty counts, plus terms found in the story title, event type or status. For each count, only its highest matching band is used.

Affected people: 1–999: +5 · 1,000–9,999: +12 · 10,000–99,999: +20 · 100,000–999,999: +28 · 1 million+: +35
Deaths: 1–9: +8 · 10–99: +14 · 100–999: +22 · 1,000+: +30
Displaced people: 1–9,999: +6 · 10,000–99,999: +12 · 100,000+: +18
Casualties: 100 or more: +8
Story wording: +10 for terms such as catastrophe, famine, war, conflict, major earthquake, mass casualty or critical. Otherwise, +5 for active, ongoing, emergency, outbreak, cyclone or hurricane.

Score bands: Watch 0–24 · Moderate 25–49 · High 50–74 · Critical 75–100. Scores are capped at 100. Missing or unparseable figures add no points.

This is a rule-based WorldsAid triage indicator, not an official or independently validated classification. It does not account for recency or local context, and it can understate events with incomplete reporting. Check the linked sources.

Last verified18 Jan 2021

Date: 18 Jan 2021
Status: CLOSED
Aid Zone: ASIA
Countries: Indonesia
Agency: IFRC

Historical record

Status: CLOSED · Imported 2026-10-07

Closed for this historical import at the site owner’s request; not a new assessment of current conditions.

Permanent node 590 · Historical archive

In brief

What happenedIndonesia’s Meteorological, Climatological, and Geophysical Agency predicts the peak of La Nina to occur in December 2020 and January 2021.
How many affectedAffected persons: 9,448
What help is neededResponse priorities should be confirmed in the linked source reports as needs change.

What changed

First retained snapshot

No earlier verified snapshot is present in the recovered dataset. This record remains available as the historical baseline.

Situation

Indonesia’s Meteorological, Climatological, and Geophysical Agency predicts the peak of La Nina to occur in December 2020 and January 2021. The peak of La Nina coincides with the peak of rainy season which usually occurs between January and February. The agency also states that this phenomenon could increase precipitation which triggers heavy rainfall across the country. During this period, Indonesia frequently suffers flood and landslides. As of January 14, 2021, several provinces in the country had reported floods and landslides since the beginning of the year. Flooding in Lhokseumawe and Langsa, Aceh province, 4 January 2021 Excessive rainfall since Saturday, 2 January 2021, caused Kareung Pase river to overflow, flooding several areas in Lhokseumawe and Langsa. The flood had caused four sub-districts namely Blang Mangat, Banda Sakti, Muara Dua, and Muara Satu to be inundated with floodwater ranging from 60-70 cm. As a result, hundreds of people from 171 households were temporarily displaced. Flooding also inundated hundreds of houses in the affected areas. In Langsa, flooding inundated four sub-districts namely Langsa Barat, Langsa Lama, Langsa Baro, and Langsa Timur. Approximately 9,448 people who reside in the four sub-districts were affected. The flood has receded, however, several Langsa areas inundated again on 12 January 2021. Indonesia’s Meteorological, Climatological, and Geophysical Agency predicts rain is still going to occur on 13-15 January 2021. The agency also categorizes several districts in the province —Aceh Barat Daya, Aceh Selatan, Aceh Tenggara, and Gayo Lues— as high-risk flood areas. Meanwhile, Indonesia’s Center for Volcanology and Geological Hazard Mitigation lists several districts in the province —Aceh Tamiang, Aceh Selatan, Aceh Timur, and Gayo Lues, and Nagan Raya— as high-risk landslides areas.

Linked charities and agencies

IFRC · Organisation profile

WorldsAid verification

A WorldsAid editor reviewed this record against 1 attributed source, cleaned feed formatting and checked the crisis, place and reporting date. 1 human-impact figure was separated from the narrative and dated where the source allowed. Earlier observations remain in the evidence history instead of being silently overwritten.