Sri Lanka National Dengue Control Unit: Weekly Dengue Update, Week 25 (15th – 21th June 2026) - ReliefWeb

During the 25th week, 5267 suspected dengue cases were reported across 24 districts, compared to 4819 cases in the previous week, reflecting an 9.3% increase. The Western Province accounted for 57.1% of total cases, with the Colombo Municipal Council (CMC) contributing 3.7%, the rest of Colombo District 20.9%, Gampaha District 23.9%, and Kalutara District 8.6%. Outside the Western Province, notable case contributions were reported from Kandy (8.4%), Matara (7.2%), Galle (4.7%), Hambantota (3.5%), Ratnapura (3%), Puttalam (2.5%), and Kegalle (2.5%) (see Table 1).