Sarawak’s dry spell is reducing water flowing into three major hydropower reservoirs, but the state grid remains reliable for now.
Rainfall in the catchments feeding Bakun, Murum and Batang Ai has fallen since April 2025. Hydropower normally supplies about 65% of Sarawak’s grid electricity, with thermal generation contributing about 34% and other sources the remaining 1%.
Sarawak Energy says the system is being adjusted to conserve water: hydropower output can be reduced during a prolonged dry period, while thermal generation is increased when needed. The utility is monitoring all three hydropower plants with state and federal agencies.
Two cloud-seeding operations were carried out in May and June under the Sarawak Government’s coordination. A third operation is tentatively scheduled for Sept 3 to 5, subject to suitable weather conditions, so that window is not yet a confirmed operation.
For households, hot weather can push up electricity use. Turning off unused appliances and spacing out high-powered devices can help. Smart-meter users can also check hourly, daily and monthly consumption through Energy Insights in the SEB cares app or web portal.
