As June advances past its midpoint with barely any meaningful rainfall and forecasts indicating that the monsoon may arrive around June 25 or even later, apprehensions are growing not only about the delay itself but also
about its broader implications for Mumbai’s essential water supply systems.
For decades, the arrival of monsoon rains was closely aligned with Mumbai’s seasonal calendar. Older residents recall a period when rains routinely began around June 1. Over time, this shifted gradually, stabilizing around a June 10 onset as the accepted norm. However, with June 17 already passed and no significant rain-bearing systems approaching the city, the possibility of the monsoon being pushed dangerously close to July is now being considered.
The delay has intensified concerns as Mumbai’s water storage system shows limited resilience heading into a potentially extended dry spell. The city depends on seven key reservoirs—Bhatsa, Upper Vaitarna, Middle Vaitarna, Modak Sagar, Tansa, Vihar, and Tulsi—for its drinking water supply. Collectively, these lakes currently hold 155,167 million litres of water, amounting to just 10.72 percent of their total storage capacity.
Despite this, officials note that reservoir levels remain higher than those recorded on the same date last year. On this date in 2024, total lake storage stood at 78,889 million litres, representing only 5.45 percent of capacity. However, authorities continue to exercise caution due to the stalled progress of the monsoon across large parts of western India, which has slowed replenishment expectations.
With rainfall systems failing to establish themselves over the region and forecasts continuing to shift, Mumbai faces an uncertain period where water demand must be carefully balanced against limited reserves. The coming days will be crucial in determining whether the monsoon stabilizes or whether the city edges closer to a prolonged pre-monsoon water stress situation.
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