Pasuruan, Indonesia is experiencing a concerning surge in dengue fever cases, with infections doubling in 2025 compared to the previous year. The rise, which has seen 492 cases recorded by the Pasuruan City Health Department, is prompting officials to link the increase to the escalating effects of climate change on disease vectors [[2]]. While no fatalities have been reported to date, the situation underscores a growing global trend of climate-sensitive infectious diseases and highlights the critical need for preventative measures [[1]].
Pasuruan, Indonesia – Dengue fever cases in the city of Pasuruan have doubled in 2025 compared to the previous year, a significant increase health officials attribute to climate change. This surge highlights the growing impact of environmental factors on infectious disease transmission globally.
According to the Pasuruan City Health Department, 492 cases of dengue fever were recorded throughout 2025. This represents a substantial rise from the 210 cases reported in 2024. “Our findings this year are higher than last year,” stated Shierly Marlena, Head of the Pasuruan City Health Department, on Tuesday, December 30th. “Thankfully, there have been no fatalities, and all patients have received appropriate medical care.”
Several factors are contributing to the increase in cases, with climate change playing a key role. High rainfall creates numerous stagnant water sources, ideal breeding grounds for the Aedes Aegypti mosquito that transmits dengue fever. Warmer temperatures and increased humidity also accelerate mosquito reproduction and extend the period when the virus can be spread.
“Global climate change is accelerating the mosquito life cycle, and increased human mobility is contributing to the spread of the virus,” explained Shierly Marlena. Beyond climate, poor sanitation, standing water accumulation, high population density, and a lack of adherence to preventative measures – specifically the “3M” approach (draining water containers, covering water storage, and managing potential mosquito breeding sites with discarded items) – are also driving the increase.
With the rainy season and potential for flooding continuing in Pasuruan, officials are urging residents to take proactive steps. Continued mosquito nest eradication efforts, combined with consistent application of the “3M” principles, are crucial to controlling the Aedes Aegypti population.
Shierly Marlena further recommended additional preventative measures, including the use of larvicides in hard-to-reach water sources, application of mosquito repellent, wearing long sleeves and pants, and trimming vegetation that can harbor mosquito larvae. “It’s important to sprinkle larvicides in water containers that are difficult to reach, use lotion or anti-mosquito medicine, wear long-sleeved shirts and long pants, and trim plants that can become breeding grounds for mosquito larvae,” she added.
