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IMD Flags Possible Delay to Monsoon Retreat as Late-Season Rains Batter Cities

Bay of Bengal lows, reinforced by a strongly negative Indian Ocean Dipole, are prolonging rainfall with a renewed spell forecast for September 25 to October 1.

Overview

  • India’s extended-range forecast points to a fresh wet phase from September 25 to October 1 that could keep central and parts of northwest India wetter than normal and slow the monsoon’s withdrawal.
  • Bengaluru recorded about 65.5 mm in 24 hours with widespread waterlogging, including flooding on the Electronic City flyover, as a yellow alert warns of more showers, lightning and gusty winds.
  • Pune saw localized heavy downpours (Lohegaon 74.8 mm, Pashan ~71 mm) that triggered waterlogging and traffic snarls, while near-full reservoirs continued releases that have swollen local rivers.
  • Multi-state advisories remain in force, with heavy rain forecast for north Bengal through September 20 and widespread rain in Arunachal through September 23, while yellow alerts cover parts of Maharashtra and Andhra; Pakistan’s PMD also expects intermittent rain in upper regions.
  • Himachal Pradesh’s SDMA reports 606 roads blocked and a cumulative monsoon death toll of 424, with light to moderate rain persisting and Pong Dam levels staying above capacity as controlled outflows continue.