Two men ride on a bike in a flooded road during a wet day in Colombo, Sri Lanka September 25, 2019.

A man asks for help as he stands in the flood waters at a neighbourhood in Patna, in the eastern state of Bihar, India, September 30, 2019. REUTERS/Stringer

The area around houses is seen flooded due to Hurricane Dorian in St.Augustine, Florida, U.S., September 4, 2019.

A man sits on a boundary wall of a house as he waits to be evacuated from a flood-affected neighbourhood in Patna, in the eastern state of Bihar, India, October 1, 2019. REUTERS/Stringer

A boy walks in a flooded road during a wet day in Colombo, Sri Lanka September 25, 2019.

Rescue members evacuate people from a flood-affected neighbourhood in Patna, in the eastern state of Bihar, India, October 1, 2019. REUTERS/Stringer

A man stands in a flooded road during a wet day in Colombo, Sri Lanka September 25, 2019.

People use a makeshift raft to move out of a flooded neighbourhood in Patna, in the eastern state of Bihar, India, September 30, 2019. REUTERS/Stringer

Residents walk past a damaged car after a wall collapsed following heavy rains in Pune, India, September 26, 2019.

A man and a boy ride a scooter through a flooded road after heavy rains in Prayagraj, India, September 29, 2019.

Damaged vehicles are seen following heavy rains in Pune, India, September 26, 2019.