Sri Lanka has recorded 91,692 dengue cases so far this year, the National Dengue Control Unit said.

Unit Director Dr. Kapila Kannangara said there has been a slight decline in the number of cases reported in recent days.

He warned, however, that case numbers could rise again with the coming North East monsoon season, and health authorities stressed the need for continued public vigilance and preventive action.

Roughly 2,600 more cases in a week

The figure marks an increase of about 2,650 cases on the 89,033 reported on August 8, when the death toll stood at 64. NewsFirst did not report an updated death toll or a breakdown by district in its account of the latest figures.

The year-to-date total has climbed steadily through 2026, from 85,364 at the start of August and 88,000 by August 6.

Why the monsoon matters

The North East monsoon typically brings rain to the northern and eastern parts of the country from around December, and standing water left by rainfall creates the container habitats in which Aedes aegypti mosquitoes breed. Case counts in Sri Lanka have historically risen in the weeks following the onset of monsoon rains.

The warning comes during a prolonged dry spell that has affected more than 68,000 people across four districts and pushed reservoir storage to 37% of capacity. Water storage practices during shortages can themselves create breeding sites if containers are left uncovered.

The control unit has run a series of campaigns this year, including a two-year eradication programme announced earlier this month.

Sources