Kerala, Mumbai See Early Onset Of Monsoon; Delhi, Kolkata, Several Other States Also Witness Downpour — IN PICS

Heavy rains and thunderstorms overnight damaged power systems, causing outages across parts of Delhi. (Source: PTI)

The thunderstorm accompanied with heavy rains disrupted flight operations, uprooting trees and electricity poles, and causing waterlogging in several areas of Delhi. (Source: PTI)

Heavy rainfall in Kolkata disrupts normal life as roads flood, transport slows, and daily routines are thrown off across the city. (Source: PTI)

People use a scarf to shield themselves during rain in Kolkata. (Source: PTI)

Roads were waterlogged in many rural and urban areas of Kochi as heavy rains continued to lash the state throughout the day. (Source: PTI)

Heavy rains and strong winds caused widespread damage to homes and crops, power outages and waterlogging on roads in Kochi as the monsoons arrived early in the state. (Source: PTI)

The southwest monsoon arrived in Maharashtra on Sunday, making it the earliest onset of the annual rainfall season over the state in 35 years. (Source: PTI)

Several low-lying areas in Maharashtra witnessed flooding disrupting traffic and creating a havoc for pedestrians. (Source: PTI)

Heavy rains lashed Himachal Pradesh in the past 24 hours, causing temperatures to drop, the meteorological department said on Sunday. (Source: PTI)

Shimla was hit by thunderstorms that uprooted trees and blew away roofs of Kachha houses. (Source: PTI)

In some parts of Guwahati, people navigated knee-deep water in certain areas, while in others, floodwaters reached chest height. (Source: PTI)

People stranded in heavy rain in Guwahati were seen using lifeboats for assistance. (Source: PTI)