The state weather bureau Pagasa said water levels at five of nine monitored dams rose slightly in the past 24 hours. Dams named in the update include La Mesa, Ambuklao, Binga, and Pantabangan.
Reservoir levels affect household water service, electricity generation, and flood control, especially during the rainy season.
Track Pagasa's daily 8 a.m. dam bulletins for changes in water levels.