Image copyright
EPA
Some districts of Asuncion are vulnerable to flooding, as here on 7 December
More than 150,000 people in Paraguay, Argentina, Uruguay and Brazil have been driven from their homes by some of the worst flooding in years.
Heavy summer rains have caused rivers to swell across a vast area.
In Paraguay, the most affected country, President Horacio Cartes declared a state of emergency, freeing up $3.5m (£2.3m) in relief funds.
The Paraguay river in the capital, Asuncion, is just 30cm (12in) away from overtopping its banks.
Thousands of people who live by the Paraguay - the country's main river - may have to be evacuated, as water levels continue to rise, the authorities said.
Image copyright
AFP
Some 130,000 people have been forced to leave their homes in Paraguay alone
Image copyright
AP
Tens of thousands of people in Paraguay have been sleeping in temporary shelters
Nearly 200 electricity pylons have been damaged or destroyed by strong winds.
Four people were killed in the country by fallen trees.
In northern Argentina, some 20,000 people have been evacuated.
At least two people have died in the floods, which have mostly affected the provinces of Entre Rios, Corrientes and Chaco.
Image copyright
Reuters
Some experts have linked the weather to a stronger than usual El Nino phenomenon
Image copyright
AFP
Flooding in north-eastern Argentina is the worse to hit the region in five decades
In the southern Brazilian state of Rio Grande do Sul, nearly 1,800 families in dozens of towns had been forced to leave their homes.
Heavy rain began to fall in the region on 18 December, swelling the Uruguay and Quarai rivers.
South of the Brazilian border, in Uruguay, thousands of people have been made homeless in the past few days.
But most of them have now returned home.
Dry weather is forecast for the Brazilian-Uruguayan border region in the next few days, but in Paraguay and Argentina water levels are still expected to rise.
