Sri Lankan health officials are battling a severe dengue fever outbreak that has seen cases double compared to the previous year [1], [2].

The surge is overwhelming the national healthcare infrastructure. Hospitals are reporting critical shortages of available beds, essential medicines, and laboratory capacity to process tests as the patient volume rises [1], [3].

Data from the Ministry of Health indicates that more than 44,000 [3] to 45,000 [1], [2] dengue infections have been recorded so far in 2024. This represents an approximate two-fold increase over the total number of cases reported throughout the entirety of the previous year [1], [2]. Reports also indicate that the outbreak has resulted in 28 deaths [3].

Several environmental and structural factors have contributed to the spike in infections. The current monsoon season has provided ample water for mosquito breeding, while unplanned urbanization has created further stagnant water traps in residential areas [3]. Additionally, the aftermath of Cyclone Ditwah left behind debris and standing water, which served as primary breeding grounds for the Aedes aegypti mosquito [3].

Health officials have launched intensified mosquito-control measures to curb the spread. These efforts focus on eliminating breeding sites and increasing public awareness about prevention. However, the rapid increase in patients continues to strain the system's ability to provide timely care to those with severe symptoms [1], [3].

“Cases have doubled compared with the whole of last year”

The convergence of extreme weather events, such as Cyclone Ditwah, and systemic urban planning failures has created a public health crisis in Sri Lanka. The doubling of cases suggests that existing mosquito control protocols are insufficient against the current environmental conditions, potentially leading to higher mortality rates if hospital capacity is not expanded.