The Rio Grande do Sul Civil Defense has maintained alerts for storms and river flooding across the Brazilian state [1].
These warnings are critical as persistent high water levels and forecasts of new rainfall increase the risk of catastrophic flooding in residential and agricultural areas. The situation threatens infrastructure and public safety in regions already struggling with water management.
Officials said the Uruguai and Jacuí rivers remain above their flood levels [1]. While some reports indicate a general hydrological trend of stability or decline in river levels, other forecasts suggest an imminent risk of flooding due to incoming weather systems [1], [2], [3].
The northern region of Rio Grande do Sul faces additional danger. The Civil Defense issued a specific alert for the period between June 30 and July 1, 2024 [2]. This warning followed a previous alert issued on June 29, 2024, regarding the potential for inundations in the north [5].
In Passo Fundo, the risk is particularly high. Forecasts for that area included the possibility of intense rain and hail, with expected rainfall accumulations reaching up to 170 millimeters [4]. The combination of saturated soil and heavy precipitation creates a high probability of flash floods, and landslides.
Local authorities continue to monitor the river gauges and weather patterns to provide real-time updates to residents. The Civil Defense said that the persistence of elevated river levels necessitates a state of high vigilance to prevent loss of life and property [1], [3].
“The Uruguai and Jacuí rivers remain above their flood levels.”
The contradictory data regarding river trends—ranging from stability to imminent increase—suggests a volatile meteorological environment where small changes in rainfall can trigger significant flooding. Because the Uruguai and Jacuí rivers are already above flood quotas, the region has little to no absorption capacity, making even moderate rain a potential emergency.
