At least 145 people have been killed, 132 reported missing, and over 619 others have been displaced as heavy rains and flooding ravage parts of Brazil.
More than two million people have been impacted by the rainfall, which scientists blame on climate change worsened by the El Nino weather pattern.
The levels of "practically all major rivers in the state are tending to rise," state officials warned Sunday.
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According to the National Center for Monitoring and Warning for Natural Disasters (Cemaden), the chances of future floods are "very high" in most of the state's areas.
Sofas and other things were spotted drifting in filthy waters in Porto Alegre's flooded old center.
Further north, in the village of Sao Leopoldo, a queue of automobiles parked along the road was partly flooded. People rowed boats down flooded streets.
Claudio da Silva, 36, checked the situation in his neighborhood and described his house as "broken."
"My brother-in-law's house next door had water halfway up the second floor." It's now a little lower, and you can get to the second story, although it's disorganized. There are plenty of dead animals. "It's very sad."
Metallurgist Antonio Vanzan, 50, referred to the situation as "critical."
