Reservoir levels across East and South India have fallen sharply, prompting water-rationing measures in several major cities and districts [1].

The shortage threatens urban stability and agricultural productivity in two of India's most populous states. With the monsoon delayed, the lack of inflows has left millions dependent on dwindling stocks as the region enters the height of the summer heat.

In Maharashtra, the impact is already being felt in Pune and Mumbai. Pune began receiving water on alternate days starting June 15 [2]. Meanwhile, Mumbai's lake levels have plummeted to 9.33% of their total capacity [3]. Reports from June 17 indicated that the city has approximately 40 days of water remaining [3].

Karnataka is facing similar crises in its northern districts. The Almatti and Narayanpura reservoirs have hit rock-bottom levels [4]. In Sindhanur, officials said they had to draw water from Turvihal lake to maintain a sufficient stock for the next three months as the main lake level dipped [5].

Broadly, reservoirs across East and South India are running 23% below normal levels [1]. This widespread deficit is attributed to below-average rainfall and the delayed arrival of the monsoon, which typically replenishes these critical water sources [1, 3].

Local authorities have implemented these restrictions to prevent a total depletion of resources before the rains arrive. The current trend indicates a significant gap between the required water volume for urban consumption and the actual available storage across these regions.

“Reservoirs across East and South India are running 23% below normal”

The simultaneous drop in reservoir levels across Maharashtra and Karnataka highlights a growing vulnerability to monsoon variability. When primary reservoirs hit rock-bottom, cities are forced into emergency rationing, which disrupts daily commerce and public health. The reliance on secondary sources, such as the Turvihal lake in Sindhanur, provides only a short-term buffer, meaning any further delay in rainfall could lead to severe water scarcity in urban centers.