Brazilian summer heat reaches peak with temperatures up to 39°C in the Central-West and Southeast regions, while storms batter the South.
Weather phenomenon causes unseasonable heat in 10 states and the Federal District; cold front in the South brings risk of hail, strong winds and even isolated tornadoes.
247 The third summer The year's peak reached this Friday (22) and should extend until Saturday (23), bringing temperatures above 35 °C in capitals of the Southeast and Midwest. The information is from g1, with data from Climatempo and Inmet.
While much of the country faces intense heat and dry air, the South is experiencing the opposite situation: the arrival of a cold front is causing heavy rain, gusts of wind, and even the risk of severe weather phenomena such as hail and isolated tornadoes.
Unseasonable heat in the South-Central region
O summer It is characterized by more than four consecutive days of heat in the middle of autumn or winter, without significant rainfall and with low air humidity. This pattern, according to meteorologists, should not be confused with heat waves, but it already has direct impacts on health and the environment.
In Cuiabá (MT), thermometers are registering up to 39 °C this Friday and are expected to repeat the same high on Saturday. Campo Grande (MS) is also suffering from the heat: a forecast of 34 °C today and 35 °C tomorrow. Goiânia (GO) should reach 32 °C, while Brasília (DF) reaches 29 °C, under clear skies and stable weather.
In the Southeast, capitals like São Paulo and Rio de Janeiro are experiencing a preview of summer. São Paulo will reach 33°C this Friday and 32°C on Saturday, but the arrival of a cold front should bring the highs down to 21°C on Sunday. In Rio, the heat will reach 35°C on Saturday, before dropping to 25°C the following day.
Belo Horizonte and Vitória will experience milder temperatures, with highs around 28°C. Even so, the low humidity is a concern: in the interior of Minas Gerais and São Paulo, levels could drop to 12%, well below the healthy limit.
Risk of wildfires and respiratory problems
With the dryness, vulnerability to wildfires and respiratory illnesses increases. In Goiás, Mato Grosso, and Minas Gerais, the relative humidity is expected to remain below 20% in the afternoon, a level considered an alert by the World Health Organization (WHO).
According to meteorologist César Soares, from Climatempo, the change in weather should happen on Sunday (24), when a mass of cold air advances over areas of the South and Southeast.
"With this, we will no longer have, at least for a period of time, these high temperatures that have been marking the last few days," he explained.
Heavy rains and cold weather in the South
In Rio Grande do Sul, Friday began with heavy rains that could exceed 100 mm in just 24 hours — a volume greater than the average for the entire month of August. Pelotas, Rio Grande, and Alegrete are among the most affected cities.
In Porto Alegre, Friday will still see a high of 26°C, but the forecast indicates a sharp drop: 22°C on Saturday and only 14°C on Sunday, under persistent rain. In addition to the intense precipitation, there is a warning for gusts exceeding 90 km/h and the possibility of hail.
Santa Catarina and Paraná are also expected to experience drastic changes. Florianópolis will reach 27°C on Saturday, but will not exceed 15°C on Sunday. Curitiba, on the other hand, will go from two hot days, with highs of 28°C, to a low of 9°C and unstable weather on Sunday.
Northeast and North: regional contrasts
In the Northeast, the coast remains unstable, with a risk of flooding in cities like Recife, João Pessoa, and Natal, while the interior remains dry and hot. Teresina is expected to reach up to 36°C on Sunday.
In the North, areas of instability are concentrated in Roraima and Amazonas. Manaus and Boa Vista will experience showers interspersed with highs of 35°C. Belém and Macapá, on the other hand, will continue to have dry weather.
How long will this Indian summer last?
According to meteorologists, the unseasonable heat is expected to last until the beginning of next week. The peak will occur between Friday and Saturday, with high temperatures in capitals such as São Paulo, Rio de Janeiro, Cuiabá, and Belo Horizonte. From Sunday onwards, the trend is for temperatures to drop, especially in the South and Southeast, due to the advance of a cold air mass.