It said that cases of leptospirosis are also increasing.

Since April 29, flooding caused by record rainfall and rising rivers has affected 2.39 million people, with 43 of them missing and 617,900 evacuated from their destroyed or flooded homes, according to the agency.

Last week's dry weather brought relief to affected cities, allowing rescue and reconstruction as well as the start of subsidy payments to affected people designated by the government, Xinhua news agency reported.

The climate tragedy has affected 475 of the 497 municipalities of Rio Grande do Sul, an important agricultural center of Brazil and the top producer of rice in Latin America.