Heavy rainfall has been affecting northern Indonesia (in particular the Sumatra Island) since 2 November, causing floods and triggering landslides that have resulted in evacuations and damage.

The ASEAN Disaster Information Network (ADINet) reports, as of 4 November, approximately 500 evacuated people, around 2,000 affected people and 400 flooded houses (including one school) across the Labuhan Batu Utara Regency (North Sumatra Province). In addition, ADINet also reports a total of 750 affected people and around 150 flooded houses in the East Aceh Regency (Aceh Province, northern Sumatra Island).

Over the next 24 hours, more heavy rainfall is forecast over the whole Sumatra Island, with very heavy rainfall over northern areas of the Island.