Heavy rain kills more than 30 in India's Telangana and Andhra Pradesh states

Roads and bridges are swept away by floodwaters, with some rivers bursting their banks

Volunteers rescue elderly residents from a flooded area after heavy monsoon rains, in Vijayawada, south-east India. AFP

Torrential rain has killed more than 30 people in India's southern states of Telangana and Andhra Pradesh, with thousands more evacuated to shelters, as the nation braces for above-average rainfall in September after a surplus last month. AFP

Residents sit on the roof of shops in Vijayawada to escape the floodwater. AFP

A boat proves the best mode of transport along a flooded street in Vijayawada. AFP

Residents up to their waists in floodwater in Vijayawada. AP

People carry what belongings they can as they seek to escape the flooding in Vijayawada. AP

Torrential rain has killed more than 30 people in India's southern states of Telangana and Andhra Pradesh, with thousands more evacuated to shelters, as the nation braces for above-average rainfall in September after a surplus last month.

Roads and bridges were swept away by flooding while emergency workers scrambled to rescue stranded people. Flooding or rain-related incidents killed at least 15 people in Telangana and 16 in neighbouring Andhra Pradesh on Sunday, authorities said.

A mother and her daughter died in their sleep after a wall collapsed at their home during a downpour in Telangana, while a scientist and her father were swept away in their car as they crossed a bridge.

Rainfall in September is likely to be more than double the average of the last 50 years, according to the India Meteorological Department. India had 15 per cent more rainfall than average in August across the northwestern and central regions, which led to flooding in some states.

The national weather agency issued a warning of extremely heavy rain for both states on Monday. The disruptive weather is being caused by a tropical depression in the Bay of Bengal, the India Meteorological Department said. It forecast thunderstorms and lightning in parts of Andhra Pradesh over the next four days, which prompted authorities to close schools.

Rivers have swelled and breached safe levels in both states, forcing national and state disaster response units to evacuate thousands of people to shelters. Indian Air Force choppers were deployed to airlift people.

Footage from local television showed emergency workers using ropes and poles to rescue people from flood-hit areas. One video on social media showed police saving a man from an overflowing river.

Parts of Hyderabad, the shared capital of both Telangana and Andhra Pradesh, were left underwater after the city received 37cm of rain on Sunday. Andhra Pradesh received more than 28.5cm of rain, according to the government. The district of Vijayawada was the worst affected, with the Budameru river bursting its banks.

"Due to Budameru breaches, floodwaters are coming into Vijayawada. As a result, all of this place has been submerged. It is very sad," said Andhra Pradesh's Chief Minister Nara Chandrababu Naidu.

Telangana's Chief Minister Anumula Revanth Reddy urged government departments to remain vigilant. More than 150 trains were cancelled while about 100 were diverted in the twin states. Hundreds of passengers were stranded at railway stations after land was washed away by floodwater, leaving tracks unusable.