Mumbai Faces Severe Rainfall and Flooding

Summary of Heavy Rainfall Impacting Mumbai in August 2025

Overview: Mumbai has been facing severe torrential rainfall from August 16 to August 19, 2025, resulting in significant disruptions across the city. With over 300 mm of rain recorded in various areas in just 24 hours, the city's rainfall has already surpassed the monthly average for August, which typically is 566 mm.

Key Rainfall Data:

• Total Rainfall in Early August 2025:
  • Santacruz: 798 mm in July; 791 mm in the first four days of August.
  • Recent 24-hour period (August 18-19): Chincholi (369 mm), Kandivali (337 mm), Dindoshi (305 mm), and Dadar (300 mm).

Impact on Life and Infrastructure:

• The heavy rains have caused the death of one individual due to a tree fall and contributed to transportation paralysis throughout the city.
• Approximately 12-14 lakh hectares of agricultural land have been adversely affected in Maharashtra, according to state Chief Minister Devendra Fadnavis.
• A significant incident occurred in Nanded where eight fatalities were reported due to a cloudburst.

Evacuation and Relief Efforts:

• The Brihanmumbai Municipal Corporation (BMC) evacuated over 350 residents from slums to civic-run schools amidst fears of flooding.
• Train services on the Harbour and Central railway lines were suspended due to track waterlogging and elevated water levels in the Mithi River, which reached 3.90 meters.
• A holiday has been declared for all educational institutions and non-essential government services.

Meteorological Analysis:

• The Indian Meteorological Department (IMD) attributes the unprecedented rainfall to a combination of weather systems:
  • The monsoon trough extending from Pakistan to the Bay of Bengal.
  • A depression over south coastal Odisha expected to weaken.
  • An upper air cyclonic circulation over the northeast Arabian Sea.
  • An offshore trough extending from south Gujarat to North Kerala.

Weather Forecast:

• The IMD forecasts that heavy rain will likely continue until at least August 21, with a red alert for Raigad and orange alerts for Mumbai, Thane, and Palghar districts.

Recent Historical Context:

• The rainfall during this period marks the rainiest August in Mumbai in the last five years, with notable levels recorded in 2020 (1,240 mm).

Important Points:

• Rainfall Details:

  • Mumbai surpassed 566 mm average August rainfall within the first four days.
  • Areas received over 300 mm rainfall in 24 hours (e.g., Chincholi, Kandivali).

• Health and Safety:

  • One death reported from a tree fall, with additional fatalities due to cloudburst.
  • 350 residents evacuated due to flooding risks.

• Economic Impact:

  • Agricultural losses affecting 12-14 lakh hectares in Maharashtra.

• Transport Disruptions:

  • Central and Harbour Line train services suspended; severe waterlogging reported.

• Meteorological Reasons:

  • Combination of a monsoon trough, a depression, and cyclonic circulation attributed to heavy rainfall.

• Emergency Alerts:

  • Red and orange weather alerts issued for affected districts.

• Service Shutdown:

  • Holiday declared for schools, colleges, and government offices except essential services.

This summary encapsulates the catastrophic impact of recent heavy rainfall events in Mumbai and the surrounding areas, highlighting critical data points on health, infrastructure, and meteorological predictions.