Buenos Aires, December 28 (RHC)-- Devastating floods have now killed at least 10 people across four South American nations, according to reports Monday.

The latest casualties were in southern Brazil, where a total four people have now been killed by mudslides sparked by heavy rainfall and flooding. Two more deaths have been reported in neighboring Argentina, and another four in Paraguay.

The heavy rains that are spurring chaos across the region showed no signs of abating late Sunday, with Paraguayan authorities warning flood levels could soon be the worst on record.

"The Paraguay River has swollen almost to eight meters. Not even the most dramatic forecasts called for that in December," said director of Paraguay's weather service, Julian Baez, according to AFP.

An estimated 160,000 people have already been displaced across the border regions of Paraguay, Uruguay, Brazil and Argentina since the disaster began on December 18th.

Paraguay has been the worst hit, with an estimated 100,000 people displaced, according to local media. At least 20,000 people have been forced to leave their homes in Argentina, according to state broadcaster Telam, while another 9,000 have been displaced in Uruguay.