The India Meteorological Department has issued a yellow heat alert for Mumbai, Thane, Palghar, Raigad and Ratnagiri, warning of hot and humid conditions in isolated pockets as temperatures remain above normal across parts of Maharashtra.
Mumbai and its suburbs are expected to experience mainly clear skies on Sunday, with the maximum temperature forecast at around 36 degrees Celsius and the minimum at approximately 26 degrees Celsius. The IMD has also warned of the possibility of heatwave conditions in the city and suburbs.
The alert covers a region where high temperatures are being accompanied by uneven air quality. According to the IMD’s 8.30 am weather report, the Colaba observatory in South Mumbai recorded a high of 35.6 degrees Celsius, while the Santacruz observatory in the suburbs recorded 37.4 degrees Celsius.
Mumbai’s overall Air Quality Index stood at 101 on Sunday morning, placing it in the moderate category, according to the Central Pollution Control Board’s SAMEER app. Air in this category can cause minor breathing discomfort to sensitive people.
Conditions varied sharply between monitoring locations. Bandra-Kurla Complex recorded the highest AQI in the city at 424, followed by Deonar at 137 and Mazgaon at 115. Borivali recorded an AQI of 79, Malad 95, Ghatkopar 67, Colaba 75 and Byculla 73.
Across the wider Mumbai Metropolitan Region, Thane recorded an AQI of 74, Navi Mumbai 80 and Kalyan 82. The variation shows how exposure can differ substantially between neighbourhoods, particularly in areas with heavy traffic, construction activity or concentrated commercial and industrial operations.
The weather alert has also coincided with new enforcement warnings for construction sites in Navi Mumbai. The Navi Mumbai Municipal Corporation has said that stop-work and sealing action will be taken against sites that violate air-pollution norms.
The warning followed a high-level joint meeting chaired on Saturday by NMMC chief Kailas Shinde with urban planners, executive engineers, architects, builders and developers. Shinde said pollution severely affects children, senior citizens and people with respiratory conditions, and urged builders to treat environmental responsibility as a social duty rather than only a business concern.
The civic body said construction sites must follow standard operating procedures aimed at reducing dust and preventing mud from being carried on to public roads. These include a ban on using drinking water for construction and dust suppression, with violations liable to immediate site sealing.
The measures also require sites to install barricades 30 feet high, fully wrap buildings with green netting and provide tyre-washing facilities at exits. Air-quality sensors and public AQI display boards are mandatory at every construction site, according to an NMMC official cited by Mid-Day.
The IMD’s yellow alert remains the immediate weather advisory for the five districts, while the NMMC’s enforcement warning establishes the civic response for construction-related pollution. Residents and construction operators will now be guided by the forecast conditions and the municipal requirements in the affected areas.
