The city recorded 51.4mm rainfall within three hours between 5.30pm to 8.30pm. The rains were followed by stormy winds at the speed of 82 to 90 kmph.
As the rains poured down, waterlogging was reported from several arterial roads leading to traffic jams, going through which took an average of thirty minutes for the motorists.
Winds also brought down several trees making the traffic worse.
While the pedestrians were left walking in knee-deep water, rainwater also seeped into houses.
As per reports, out of the 11 dead, six people were killed by electrocution at Chandni Chowk , Mansarovar Park and West Patel Nagar, and five died in a wall collapse at Vivek Vihar and Jhilmil Colony.