Warning of more storms in RS Floods could hit cities on the banks of five rivers in Rio Grande do Sul in the coming days, according to an update to the Hydrometeorological Warning released on Tuesday (28) by the State Civil Defense Monitoring Center (CMDEC). The forecast of moderate to heavy rain, added to the current conditions of water courses, increases the risk of overflows, floods in streams and flooding in urban areas. ? Access the g1 RS channel on WhatsApp The Uruguay rivers, between São Borja and Uruguaiana, and Sinos, in São Leopoldo, have already registered levels above the flood level at monitoring stations. Areas with hydrological risk in RS between July 28th and 30th Disclosure/ Civil Defense of RS According to Civil Defense, there is a risk of river levels temporarily exceeding the flood mark in municipalities located along the rivers: Jacuí, between Dona Francisca and Cachoeira do Sul; Taquari, between Encantado and Taquari; Caí, between São Sebastião do Caí and Montenegro; Sinos, between Campo Bom and São Leopoldo; Gravataí, between Gravataí and Cachoeirinha. The agency also warns of the possibility of flooding in unmonitored streams and small rivers, as well as flooding points in urban centers. Areas classified as Attention and Alert have a greater probability of occurrences related to the increase in rainfall volumes predicted for the next few days. Rain forecast Rain in Porto Alegre in September 2025 Alex Rocha/PMPA Wednesday (29) will still be marked by rain and the risk of storms in areas of Rio Grande do Sul, although instability begins to lose strength in part of the state throughout the day. According to Climatempo Meteorologia, the most severe conditions are expected to be concentrated in the North, Northwest, Northeast, Serra, Vales and North Coast regions, where intense rain, hail and winds that can exceed 90 km/h are expected. The tendency is for the cold front to advance towards the North of Rio Grande do Sul, gradually reducing the effects of the bad weather in regions such as the West, Campanha and South. In these places, the weather should improve and the rain will decrease throughout the day. In the Metropolitan Region, the forecast indicates periods of rain and the possibility of isolated thunderstorms, mainly in the morning. In the afternoon, the instability loses intensity. Temperatures should vary between 16°C and 21°C. Thursday will have firmer weather On Thursday (30), a mass of dry air should favor the predominance of stable weather in practically the entire state. The sun should return between few clouds and temperatures will be lower, especially during the early hours of the morning, when the feeling of cold will be more intense. Even with the improvement in weather conditions, the impacts of the previous days' rain must continue to be monitored. Rivers remain high, and there is still a risk of flooding and flooding in the most affected areas. In the east of the state, the circulation of moisture from the ocean can cause isolated showers of rain. New cold front approaches on Friday The forecast for Friday (31) indicates an increase in cloudiness with the formation of a new cold front between Argentina and Uruguay. The first areas to feel the effects of the system should be the West, Campanha and part of the Central region, where isolated rain showers may occur. In other regions, including the Metropolitan Region, the Valleys, the Mountains and the Coast, the weather is expected to remain firm for much of the day, although with a gradual increase in clouds. According to the forecast, instability tends to intensify between Friday night and Saturday. Meteorological models indicate the advance of voluminous rain from Uruguay to the South and Southwest of Rio Grande do Sul, which increases the risk of new flooding and other disturbances in these areas. VIDEOS: Everything about RS