The city has seen a sharp increase in dengue and leptospirosis cases in the last fortnight, with an average of 28 new dengue cases being reported every day. Overall, dengue infections have increased by 58% during this period, while leptospirosis has increased by 79%.
Health officials have attributed the increase to the sudden onset of rains after a long break in the monsoon, which has created favourable conditions for mosquito breeding.
According to the Brihanmumbai Municipal Corporation (BMC) health department, a total of 1,160 dengue cases have been reported so far this year, of which 426 have been reported in the last 15 days. That is, an average of at least 28 new cases are being reported every day.
Compared to the same period last year, 194 dengue cases have been reported in the city, an increase of 20%. Leptospirosis cases have also increased in the last two weeks.
Of the 244 cases reported between January and July 2025, 108 were reported between July 16 and July 31. Although this is a 79% increase in just 15 days, the total number of cases is slightly lower than the same period last year. Last year, 281 cases were reported.
There has also been a significant increase in malaria. By the end of July, 4,151 cases have been reported in Mumbai, while there were 2,582 cases in the same period in 2024. Of these, 664 new cases were reported in the last fortnight. A total of 3,490 cases were found on July 15.
There has also been a big increase in chikungunya. From January to July 2025, 265 cases were reported in the city, compared to only 46 cases in the same period last year. 86 new cases were reported in the last 15 days alone.
On a positive note, there has been a slight decline in gastroenteritis cases. 5,128 cases have been reported till July this year, as against 5,439 cases during the same period last year.
Following a recent visit by officials from the National Centre for Vector Borne Disease Control (NCVBDC) in Delhi, the civic body has launched a city-wide “Zero Mosquito Breeding Campaign”. The campaign is focusing on eliminating mosquito breeding grounds in civic hospitals, government offices and residential areas.
Between July 1 and 31, the civic body conducted extensive fieldwork, surveyed over 14.39 lakh households and checked the temperature of 69.89 lakh people.
Around 2.31 lakh blood samples were collected and several health camps and workplace interventions were organised to create awareness.
The vector control team inspected over 5,000 premises and found 29,841 breeding sites of Aedes mosquitoes. They removed around 86,915 potential breeding sites, including discarded containers and tyres.
The fogging campaign covered 52,593 buildings and over 8.16 lakh slums in the city.
The civic body has appealed to citizens to drain stagnant water around their houses, avoid storing old tyres or open containers and use mosquito repellents or nets.
People with fever are being advised to visit the nearest civic body hospital instead of self-medicating.