Kolkata: Torrential overnight rain left Kolkata paralysed on Tuesday, killing at least seven people due to electrocution and bringing life in the metropolis to a grinding halt as large swathes were submerged, transport services crippled, and traffic movement thrown out of gear.

According to IMD data, with an average of 251.4 mm overnight downpour, this was the third-highest September month rainfall, which battered the city in nearly half a century, with some pockets receiving as high as 332 mm of rains in just a few hours.

The relentless downpour caused massive flooding across the city, leaving thousands of commuters stranded and severely affecting transport services across roads, railways and flights.

Chief Minister Mamata Banerjee described the downpour as "unprecedented", lashing ou

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