Lahore (AFP)

Pakistan's second largest city of Lahore was deluged with record-breaking rainfall on Thursday, the national weather agency said, with hospitals flooded and power cuts reported.

The eastern city of 13 million people was lashed by almost 360 millimetres of rain in three hours, the Pakistan Meteorological Department (PMD) said, breaking a previous record of 332 millimetres over three hours in July 1980.

"This was record-breaking rainfall," the agency's deputy director Farooq Dar told AFP.

One person was killed by electrocution as a result of the cloudburst on Thursday morning, local police said.

The agency had forecast a wetter-than-usual monsoon season this year in Pakistan, one of the countries experts say is most vulnerable to extreme weather being spurred by climate change.