Sri Lanka National Dengue Control Unit: Weekly Dengue Update, Week 37 (07th – 13th September 2026) - ReliefWeb

During the 37th week, 1156 suspected dengue cases were reported across 25 districts, compared to 1152 cases in the previous week, reflecting 0.35% increase. The Western Province accounted for 43.1% of total cases, with the Colombo Municipal Council (CMC) contributing 3.2%, the rest of Colombo District 14.7%, Gampaha District 18.9%, and Kalutara District 6.3%. Outside the Western Province, notable case contributions were reported from Kandy (15.1%), Kegalle (6%), Galle (6%), Ratnapura (3.8%), Kurunegala (3.3%), Matara (3.3%), Puttalam (2.9%), Kalmunai (2.7%), and Badulla (2.2%) (see Table 1) (compared to the previous week, colour of %: red=increase, green=decrease, blue=no change).