Monsoon rain caused the wall to collapse that killed 27 people in India on Tuesday, as a second day of bad weather disrupted rail and air traffic in the financial capital Mumbai, prompting officials to shut schools and offices, though markets were open.
Heavy rain brought a wall crashing down on shanties built on a hill slope in Malad, a western suburb of Mumbai, a fire brigade official said, killing 18 people.
Three people died when a school wall collapsed in the city of Kalyan, 42 km north of Mumbai.
In the nearby western city of Pune, six people were killed in a wall collapse on Tuesday, a fire brigade official said, after a similar incident on Saturday killed 15.
About 1,000 people stranded in low-lying areas of the city were rescued after a swollen river began to overflow, municipal authorities said.