Sri Lanka National Dengue Control Unit: Weekly Dengue Update, Week 34 (17th - 23rd August 2026) - ReliefWeb

During the 34 th week, 1802 suspected dengue cases were reported across all 26 districts, compared to 2613 cases in the previous week, reflecting 31% decrease. The Western Province accounted for 52.6% of total cases, with the Colombo Municipal Council (CMC) contributing 3.8%, the rest of Colombo District 20.7%, Gampaha District 20.5%, and Kalutara District 7.5%. Outside the Western Province, notable case contributions were reported from Kandy (10.4%), Galle (5.1%), Kegalle (4.6%), Ratnapura (3.2%), Matara (3.2%), Kurunegala (2.7%), Hambantota (2.4%), Anuradhapura (2.3%), and Badulla (2.3%). (see Table 1) (compared to the previous week, colour of %: red=increase, green=decrease, blue=no change)