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Monsoon Rains Drive Sharp August Spike in Mosquito-Borne Illnesses in Mumbai

City officials expanded door-to-door fever checks, collecting 1.84 lakh blood samples to trace infections.

Overview

  • BMC data show month-on-month jumps from July to August: malaria 4,151 to 5,706, dengue 1,160 to 2,319, and chikungunya 265 to 485.
  • Over the past 15 days, the city averaged 55 malaria cases and 47 dengue cases daily, reflecting a sustained late-August rise.
  • August operations included surveys of 10.66 lakh houses covering 50.2 lakh people, inspections of over 57,000 breeding sources, removal of 65,000-plus tyres and odd articles, and fogging across tens of thousands of premises and huts.
  • For January–August 2025, malaria, dengue and chikungunya totals exceed the same period in 2024, while leptospirosis, gastroenteritis and Covid-19 are lower; clinicians report more severe presentations even as no deaths have been officially recorded so far.
  • State data identify Pune district as Maharashtra’s dengue hotspot with 265 cases through August 21, while PMC reports 28 confirmed dengue and five chikungunya cases in August within the city alongside rising suspected counts.