<![CDATA[Background: Dengue Hemorrhagic Fever (DHF) remains one of the major vector-borne diseases and continues to pose a significant public health challenge in Indonesia. Environmental factors such as uncovered water storage containers, standing water, discarded water-holding items, and inadequate drainage systems contribute to the breeding of Aedes aegypti mosquitoes and increase the risk of dengue transmission. Focal fogging is one of the emergency vector control measures implemented following the confirmation of dengue cases to interrupt disease transmission.Method: This descriptive observational study was conducted on May 26, 2026, at Jalan Tidung 7 Setapak 5, Mappala Subdistrict, Rappocini District, Makassar City. Data were collected through direct environmental observations and larval surveillance in 20 houses located within a 100-meter radius of the confirmed dengue case using an observation checklist based on the Indonesian Ministry of Health dengue control guidelines. The assessed variables included uncovered water storage containers, standing water, discarded water-holding items, drainage conditions, and the presence of mosquito larvae. Data were analyzed descriptively and presented as frequency distributions and percentages.Result: The most frequently identified environmental risk factor was uncovered water storage containers, observed in five houses (25%), followed by standing water in four houses (20%), discarded water-holding items in three houses (15%), and inadequate drainage in two houses (10%). Larval surveillance identified mosquito larvae in one house (5%), corresponding to the index dengue case. Focal fogging was implemented in all houses within a 100-meter radius of the confirmed case in accordance with the national dengue control guidelines.Conclusion: Several environmental risk factors associated with dengue transmission were identified in the study area. Focal fogging was successfully implemented as an immediate response to the confirmed dengue case; however, sustainable dengue prevention requires continuous environmental management, routine larval surveillance, elimination of mosquito breeding sites, and active community participation to reduce the risk of disease transmission.]]>
