Sri Lanka National Dengue Control Unit: Weekly Dengue Update, Week 31 (27th July - 2nd August 2026) - ReliefWeb

During the 31st week, 4391 suspected dengue cases were reported across all 26 districts, compared to 6004 cases in the previous week, reflecting an 26.9% decrease. The Western Province accounted for 52.5% of total cases, with the Colombo Municipal Council (CMC) contributing 3.8%, the rest of Colombo District 19%, Gampaha District 21.2%, and Kalutara District 8.5%. Outside the Western Province, notable case contributions were reported from Kandy (8.9%), Galle (5.6%), Matara (4.7%), Kegalle (3.9%), Ratnapura (3.6%), Kurunegala (3.2%), Puttalam (2.7%), Badulla (2.3%), and Hambantota (2.2%) (see Table 1) (compared to the previous week, colour of %: red=increase, green=decrease, blue=no change).