"Precise water allocation management is key to ensuring that electricity supply from hydroelectric plants remains stable throughout the peak dry period," BMKG Deputy for Climatology Ardhasena Sopaheluwakan said during a press briefing in Jakarta on Thursday.
Indonesia’s weather agency also urged hydroelectric plant operators nationwide to carefully manage water resources, warning that a strengthening El Niño could spark electricity demand while drying up key reservoirs.
He cautioned that surging air temperatures drive peak electricity usage just as dam water levels drop.
"Rainfall information is vital for determining water usage plans at hydroelectric plants. Hot weather typically triggers a surge in energy consumption, making climate data essential for taking proactive measures," Ardhasena said.
Soaring summer temperatures increase reliance on air conditioning, placing greater pressure on the power grid.
At the same time, clean energy output from hydroelectric dams risks being compromised if water reserves decline without careful management.
The agency forecasts that El Niño will continue to strengthen, likely peaking between December 2026 and January 2027, with a significant chance of developing beyond a "strong" category.
As of late July, the dry season has expanded across 54.5 percent of Indonesia, heavily impacting southern territories including Java, Bali, Nusa Tenggara, and parts of Sumatra and Papua—with some regions recording more than 60 consecutive days without rain.
Related news: Indonesia warns strong El Niño to fuel drought until early 2027
Translator: M. Riezko Bima Elko Prasetyo, Aditya Eko Sigit Wic
Editor: Bayu Prasetyo
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