The last week of September will see a change in the weather in the Southeast and risk of a cyclone in the South; see the forecast for your region In Cuiabá, thermometers can reach 43ºC on Monday (25) and Tuesday (26). In São Paulo, Rio de Janeiro and Vitória, they could drop more than 10°C from Wednesday (27) to Thursday (28). See the forecast in your region. Brazil is expected to continue facing heat during the last week of September. In Cuiabá, thermometers can reach 43ºC on Monday (25) and Tuesday (26). Between Tuesday and Wednesday (27) this week, the formation of a new extratropical cyclone in the high seas, close to the coast of Rio Grande do Sul and Santa Catarina, will help to further intensify instability over part of the region. Southern Brazil, says ClimaTempo. Areas in the south, east, coast, Greater Porto Alegre region and the extreme north of Rio Grande do Sul are on alert. The tendency is for the cyclone to move away by Wednesday (27). In Santa Catarina, with the formation of the cyclone, storm clouds are reinforced and parts of the east and south of Santa Catarina are on alert for heavy rain. Curitiba, where the expectation for Sunday was 42°C, should have a maximum of 18°C on Thursday (28). The Southeast, mainly São Paulo, should feel the influence of the cyclone and temperatures should drop all at once from Wednesday (27) to Thursday, according to MetSul Meteorologia. In São Paulo, the maximum will drop from 35° to 20°, in Rio de Janeiro, from 37°C to 22°C and in Vitória, it will be from 37°C to 27°C. Despite the heat, in the North there is a chance of isolated rain showers during the week in the following capitals: Boa Vista, Manaus, Porto Velho and Rio Branco. In the Northeast, it should be hot, but with lots of clouds. The atypical heat wave began on Monday (17), the last days of winter. The increase in the intensity of the heat wave, which has resulted in temperatures above average for 11 states and the Federal District, caused Inmet to extend the 'great danger' alert. In general, a red alert, according to the institute, is issued when a meteorological phenomenon of 'exceptional intensity is expected, with a high probability of major damage and accidents occurring, with risks to physical integrity or even human life'. The alert is valid until 6pm on Tuesday (26). On the first day of spring, Brazilian states recorded temperatures above 40ºC. The heat exceeded 40ºC in all regions of the country: North, Northeast, Central-West, Southeast and South. The hottest area in the country was the Central-West, where the maximum for the second day in a row was around 42ºC.
Brazil is experiencing significant weather fluctuations in the last week of September. There's a risk of a cyclone forming in the south, leading to unstable conditions and heavy rain. Temperatures in some areas are expected to drop suddenly, while others will remain hot. An 'exceptional intensity' weather alert has been extended due to these extreme conditions.