Sri Lanka Battles Worst Dengue Outbreak in Years, 44,000 Cases

Sri Lanka is battling its worst dengue fever outbreak in years, with 44,000 cases and 28 deaths recorded since January. Cyclone Ditwah, which struck in late November 2025, left debris and stagnant water that created ideal breeding grounds for mosquitoes. Health officials warn the surge could match the 2019 outbreak, when Sri Lanka recorded over 105,000 dengue patients. Public hospitals face severe strain as infections continue to rise.

Cases Nearly Double in June

Dengue cases jumped from 5,651 in April to 10,638 in the first two weeks of June, data from the National Dengue Control Unit showed. More than half of all cases come from the western region, with 9,429 cases in Colombo alone. Eight other districts have reported more than 2,000 patients each since the start of 2026.

Health officials expect infections to increase for at least two more weeks before tapering off. The 28 deaths include five children. If the outbreak continues at this pace, 2026 could end with case numbers matching or exceeding the 2019 crisis.

Cyclone Damage Worsens Mosquito Breeding

Cyclone Ditwah, which hit Sri Lanka in late November 2025, left behind debris and standing water across the island. Dr. Prashila Samaraweera, consultant community physician at the National Dengue Control Unit, told Reuters that mosquito breeding sites increased sharply after the storm. Unplanned urbanization has also made the problem worse by creating more areas where water collects.

Dengue is common during Sri Lanka’s monsoon season, but the combination of cyclone damage and rapid urban growth has accelerated the 2026 outbreak beyond typical seasonal patterns.

Health System Under Pressure

Sri Lanka’s Health Minister Nalinda Jayatissa warned that a further rise in patient numbers could put public hospitals under severe strain. Schools, homes, construction sites, and public buildings are being cleaned as part of a nationwide mosquito control campaign running through June 22.

With 51,000 cases recorded in all of 2025, the 2026 outbreak is already tracking well ahead of last year’s total. Health authorities have launched special cleaning programs to reduce mosquito breeding grounds before the expected peak.

Final Thoughts

Sri Lanka faces a dengue crisis that could rival its 2019 outbreak. With 44,000 cases already recorded and hospitals under strain, the next two weeks will determine whether the outbreak peaks or continues to accelerate.

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