According to the agency, more than 637,000 people have been evacuated and 61 people are still missing and about 2.3 million people in 469 municipalities have been affected.

It said the state has suffered losses worth millions of dollars in trade, industry and agribusiness, Xinhua news agency reported.

Rainfall in Rio Grande do Sul since April 29 has caused damage to the state's roads and disrupted traffic. The situation in the state capital Porto Alegre had improved on Monday, but rains that started on Thursday have caused flooding again.