Torrential rainfall in Rio Grande do Sul, Brazil's second-largest soybean and sixth-largest corn state, is disrupting the final stages of soy harvest, Reuters reported. Massive flooding and landslides triggered by days of heavy rain in Brazil’s southernmost state inundated fields, cities and farms.

Historically, soy farmers in Rio Grande do Sul would have harvested 83% of the area at this time, but the heavy downpours have disrupted the work, according to state crop agency Emater.

The impact of the downpours could cause a drop in production of up to 15% in the state, Leandro da Silva, a manager at farm cooperative Cotrisal, said on Friday. He now sees output at between 19 million metric tons and 20 million metric tons.

Analysts estimate up to 40% of the center and south soy areas of the state remain to be harvested, and about 10% in the north, making it difficult to estimate yields and losses at the moment, Reuters reported. They said around 5 million tons of soybean are likely "at risk" due to rains and flooding, but suggested that final losses could be lower at around 1 million to 2 million tons.

As heavy flooding hit Southern Brazil, Chicago soybean jumped to their highest point in more than three weeks.