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.