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Indonesia: Floods and Landslides - May 2016

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Between 10 to 13 May, floods and flash floods occurred in the provinces of South, West and Central Kalimantan, Bengkulu and Gorontalo. The incidents flooded 3,550 houses for several days. In Kotabaru District (South Kalimantan), flash floods killed three people with one still missing. The monsoon season in Indonesia typically runs from November to March – the amount of rainfall and intensity during the past week is unusual at this time of year. (OCHA, 16 May 2016)

Since 25 May, some 2,400 houses were flooded for several days in South Sulawesi, West Java and Banten provinces. There were no reported casualties or major damage. Local governments provided assistance to the affected people.

In another incident, flash floods, triggered by heavy rainfall on 22 May, killed six people in Subang District, West Java. An estimated 390 people remain displaced in IDP sites. The local government declared an emergency response for a week and provided basic relief assistance. (OCHA, 30 May 2016)

From 5 to 9 June, flooding triggered by high tides and heavy rainfall occurred across 12 provinces in Sumatra, Java, Bali and Nusa Tenggara. At least 5,900 houses and temporary stalls were damaged and more than 30,000 houses were flooded. (OCHA, 13 June 2016)

From 17 to 20 June, the Indonesian Agency for Meteorological, Climatological and Geophysics (BMKG) issued heavy rainfall and high tide warnings for parts of Sumatra, Java, Bali, and East Nusa Tenggara. In Central Java province, floods and landslides caused 35 deaths while 25 are still missing according to the National Agency for Disaster Management (BNPB). At least 100 houses were damaged. On 17 and 18 June, flooding also occurred in West Sumatra province, causing one death. (OCHA, 20 June 2016)

According to the National Agency for Disaster Management (BNPB), flooding and landslides in Central Java province caused 59 deaths, with four people still missing. In Purworejo, the worst affected district, about 350 people remain displaced. Search and rescue operations ended on 24 June. In North Sulawesi province, flooding and landslides also caused five deaths and damaged over 200 houses. An estimated 600 people remain displaced and are being supported by the local government. Rains continue to affect Java, Sumatra and Kalimantan. (OCHA, 27 June 2016)

On 16 July, prolonged and heavy rainfall that began on 14 July triggered flooding in North Konawe district, North Sulawesi province. Up to 2.5 metres of flood water submerged 730 houses and displaced some 1,350 people. Local disaster management authorities provided assistance to the affected communities. While the flood water has receded in the upland areas, the risk of additional floods remains as a result of continuing unseasonal rains. More than 1,350 people have been displaced. (OCHA, 18 Jul 2016)

On 19 July, at least 100 houses were inundated in Sorong city, West Papua province as flash floods swept through the area. Around 200 houses were also flooded in southern Jakarta on 22 and 23 July. There were no reported casualties. Local authorities provided assistance to the affected communities.(OCHA, 25 Jul 2016)

From 01-07 August, 45 houses were flooded in Ende, East Nusa Tenggara Province. The local authorities evacuated 231 people. (ASEAN, 07 August 2016)

From 08-14 August, floods inundated an estimated 250 houses in Ciamis, in West Java Province. (ASEAN, 14 August 2016)

From 15-21 August, widespread landslides affected 386 families and damaged rice fields and infrastructure in the district of Sukabumi, in West Java. Heavy rains triggered floods and flash floods in several districts in East Java Province. These incidents affected 19,964 people and damaged 4,991 houses and 48 hectares of agricultural land. (ASEAN, 21 August 2016)

From 22 - 28 August, torrential rain caused heavy flooding in Jakarta, impacting nearly 33,000 people. Floods also affected parts of Aceh province. In Aceh Jaya, 4,000 houses were inundated; 15,000 people were reportedly affected. In West Aceh, floods submerged 2,528 houses and affected nearly 9,500 people. (ASEAN, 28 August 2016)

From 29 August - 4 September, floods affected 756 people in Cianjur, West Java Province, while 600 people were evacuated due to flooding in Deli Serdang, North Sumatra Province. A landslide in Pontianak, the capital of West Kalimantan province, damaged 57 homes. (ASEAN, 4 Sept 2016)

Meanwhile, a La Niña weather event will likely start in August or September 2016 and will continue into the last quarter of 2016, causing wetter than normal weather conditions. The Indonesia Weather and Meteorology Bureau (BMKG) predicts unusually high rainfall will continue until September 2016 in most of the country. Rainfall levels in Java, the eastern areas of Sulawesi, central Papua and southern Kalimantan and Sumatra may increase significantly by up to 200 percent. Current weather and the possible La Niña conditions increase the risk of more frequent and intense flood events and landslides. In the coming rainy season this may mean more causalities and damage, and may impact food access by disrupting travel networks and food storage, and health and nutrition status by higher risk of waterborne diseases. (WFP, Govt. of Indonesia, 23 August 2016)

Flash floods in Garut, West Java on 21 September caused 33 deaths, with 20 people still missing and over 6,000 people temporarily displaced. Government agencies, the Red Cross, NGOs and the private sector are providing clean water, food, NFIs, shelter and rehabilitating critical infrastructure. Flooding was also reported in West Lombok, West Nusa Tenggara and Sampang, East Java on 24 and 25 September which left 2,000 houses under water. Local authorities provided relief to the affected people. (OCHA, 26 Sep 2016)

From 03 - 09 October, heavy rains triggered floods and landslides in Banjar City, West Java Province, affecting at least 136 homes. Flooding also submerged 561 homes in Central Java's Surakarta. (ASEAN, 09 October 2016)

Following days of torrential rainfall and high tides, at least 1,000 houses were flooded in coastal areas of Palopo City, South Sulawesi province on 21 and 22 October, affecting about 3,000 people. Flood waters also damaged around 250 hectares of rice fields and farm land. (OCHA, 24 Oct 2016)

Heavy rain caused flooding in parts of the central and western areas of the country in the period including 24-25 October. Approximately 189 mm of rain in 24 hours were recorded in Paotere city (South Sulawesi province) during this period. According to official reports, as of 26 October early morning (UTC), one person has died in Bandung city (West Java province) and more than 1,100 houses have been damaged in the provinces of West Java and South Sulawesi. (ECHO, 26 Oct 2016)

Over 24 hours during 25-26 October, approximately 131 mm of rain was recorded in Gorontalo city, in Gorontalo province on Sulawesi Island. According to official reports, as of 27 October, 1 500 houses have been damaged in Gorontalo. Local media also reported that 11 people have been killed in Merangin district (Jambi province, Sumatra Island). (ECHO, 27 Oct 2016)

Between 29 and 31 October, 5,000 houses were flooded in Gorontalo and West Java provinces, affecting about 15,700 people and killing three children. In Jambi province, flooding was also reported on 27 and 28 October, affecting 350 people. Local governments provided temporary shelter, food, water and health services to the affected people. With the start of the rainy season and the ground already saturated with water, it is expected that floods and landslides will be more likely over the next five months. (OCHA, 31 Oct 2016)