15 July,2026 08:03 PM IST | Mumbai | Ritika Gondhalekar
The BMC attributed the rise in leptospirosis to continuous heavy rainfall and waterlogging across several parts of the city. Representational pic
Mumbai has recorded a rise in several monsoon-related diseases, including dengue, malaria and leptospirosis, in 2026 compared to the corresponding period last year, according to the Brihanmumbai Municipal Corporation's (BMC) latest monsoon health report for the period January 1 to July 14.
The data shows malaria cases increased by 18.2 per cent, rising from 3,115 cases in 2025 to 3,681 in 2026. Dengue infections also registered a significant 27.8 per cent jump, increasing from 734 to 938 cases, while leptospirosis cases rose 15.4 per cent from 136 to 157. H1N1 infections nearly tripled, climbing from 42 cases in 2025 to 113 this year, marking the sharpest increase among the reported diseases.
In contrast, chikungunya cases dropped sharply by 82.7 per cent, falling from 179 cases last year to just 31 this year.
Gastroenteritis cases also declined by 19.9 per cent, reducing from 4,831 to 3,866. The most dramatic improvement was seen in COVID-19 infections, which plummeted by 93.2 per cent, from 1,049 cases in 2025 to only 71 cases in 2026.
The BMC attributed the rise in leptospirosis to continuous heavy rainfall and waterlogging across several parts of the city, urging residents exposed to contaminated floodwater to seek preventive medication. As part of its monsoon preparedness, the civic body has surveyed over 10.69 lakh households, screened 36.81 lakh residents, collected more than 1 lakh blood samples, and administered preventive leptospirosis treatment to 90,728 citizens. A special construction-site drive covering 3,000 sites also led to the detection and treatment of 37 malaria-positive workers.
The duration for comparison of cases is January 1, 2025 to July 14, 2025 v/s January 1, 2026 to July 14, 2026.
