Mumbai: Malaria, Dengue, Chikungunya Spike In Mumbai As Early Monsoon Worsens Drainage Woes

Mumbai’s monsoon, arriving two weeks early this year, has brought with it a worrying surge in seasonal illnesses. Latest data from the Brihanmumbai Municipal Corporation (BMC) reveals that malaria cases in the city nearly doubled in June 2025, compared to the same period last year.

In June alone, Mumbai recorded 884 malaria cases, up sharply from 443 in June 2024. Chikungunya, which had zero cases last year, has suddenly emerged with 21 reported infections, and dengue, a perennial threat, remains at alarming levels with 105 cases this monsoon.

Doctors across the city report that hospitals are witnessing a steady flow of patients suffering from mosquito-borne and water-borne illnesses. Thankfully, no deaths have been reported so far, but health experts warn that the risks remain high, especially in densely populated areas, slum clusters, and under-construction zones, which are breeding hotspots for mosquitoes.

“The early monsoon arrival on May 26, combined with poor drainage, waterlogging, and ongoing construction, has created the perfect storm for mosquito breeding,” explained Dr. Himlata Arora, Consultant Physician at Nanavati Max Super Speciality Hospital. “Most malaria cases are vivax malaria, which fortunately is responding well to treatment. However, dengue and chikungunya are also on the rise.”

Apart from mosquito-borne illnesses, seasonal viral infections, flu, and water-borne diseases like typhoid are also making their presence felt, adding to the city’s health burden.

Dr. Arora urges residents to be proactive: avoid consuming roadside food and water during the rains, wear protective clothing, use mosquito repellents, and eliminate standing water around homes and societies. Community-level vigilance is critical to prevent breeding grounds from forming in stagnant water, especially in construction sites and garbage dumps.

With no signs of the rains letting up, Mumbai’s residents are advised to stay alert and prioritise hygiene to keep these illnesses at bay.