Indonesia faces diverse weather risks from floods to forest fires

weather forecast flood mitigation forest fires El Nino meteorological disasters

Indonesia is facing diverse and extreme weather patterns as the country navigates the effects of a very strong El Nino. While much of the archipelago experiences dry conditions, significant meteorological risks persist across various regions.

In Sumatra, a surge in hotspots has been detected, particularly in South Sumatra, leading to haze that has rendered air quality in Riau ‘very unhealthy’. Conversely, parts of Sumatra, including Aceh and West Sumatra, face risks of heavy rain, lightning, and strong winds. In Aceh Barat, local authorities have initiated emergency preparedness across 12 districts to mitigate potential flooding and landslides predicted to continue into early 2027.

Other regional alerts include coastal tidal flooding (rob) warnings for Nusa Tenggara Timur through October 10, 2026, driven by new moon lunar phases. In East Java, while high winds have begun to subside, extreme heat remains a concern in areas like Sidoarjo and Mojokerto, where temperatures are reaching 36 degrees Celsius. Authorities continue to advise vigilance regarding both forest fire risks in dry areas and hydrometeorological disasters in high-rainfall zones.

Entities

Aceh Barat · BMKG · Indonesia · Nusa Tenggara Timur · Sumatra · West Java

Claims

What the coverage asserts, and how many sources carry each claim.

[○ 1 SOURCE] Rainy season peak in West Java is expected in February 2026 across 71 percent of the province.
[○ 1 SOURCE] Atmospheric Rossby waves are contributing to recent rainfall in West Java.
[○ 1 SOURCE] Light to moderate rain is expected in several West Java regencies including Bogor, Sukabumi, Cianjur, and Bandung on October 8, 2026.
[DISPUTED] El Niño is expected to delay the start of the rainy season in 95 percent of the West Java region.
[○ 1 SOURCE] Light rain is forecast for Medan, Pekanbaru, Padang, Bengkulu, Samarinda, Denpasar, and Mamuju. www.viva.co.id
[DISPUTED] The rainy season in West Java is forecast to begin in November across 49 percent of the province.
[● 2 SOURCES] Hazy conditions and smoke or fog are reported in Palembang, Pangkal Pinang, Banda Aceh, Bandar Lampung, Palangkaraya, and Kendari. minanews.net · www.viva.co.id
[○ 1 SOURCE] Moderate to heavy rain with potential lightning and strong winds is forecast for parts of Sumatra, including Aceh, North Sumatra, and West Sumatra. minanews.net