Residents of Nepal's flood-hit capital returned to their mud-caked homes on Sunday to survey the wreckage of devastating floods that have killed at least 170 people across the Himalayan republic.

Deadly rain-related floods and landslides are common across South Asia during the monsoon season from June to September, but experts say climate change is increasing their frequency and severity.

Entire neighborhoods in Kathmandu were inundated over the weekend with flash floods reported in rivers coursing through the capital and extensive damage to highways connecting the city with the rest of Nepal.