Sri Lanka, May 4 -- Heavy rains in the southern Brazilian state of Rio Grande do Sul killed 39 people, with another 68 still missing, the state civil defense agency said Friday, as record-breaking floods devastated cities and forced thousands to leave their homes.

It was the fourth such environmental disaster in a year, following floods in July, September and November 2023 that killed 75 people in total.

The flooding statewide has surpassed that seen during a historic 1941 deluge, according to the Brazilian Geological Service. In some cities, water levels were at their highest since records began nearly 150 years ago, the agency said.

On Thursday, a dam at a hydroelectric plant between the cities of Bento Goncalves and Cotipora partial...