Cold mornings, hot afternoons, and risk of flooding: see what the weather will be like in Brazil until Sunday.

247 - Brazil will experience a weekend with stark climatic contrasts across its regions. While the South, Southeast, and parts of the interior Northeast will wake up to low temperatures, the Central-West and areas of the North will face hot, dry afternoons, and the coastal regions of the North and Northeast will remain under the influence of rain. This information comes from [source name/source - context needed]. g1, based on data from the National Institute of Meteorology (Inmet) and the National Center for Monitoring and Alerting of Natural Disasters (Cemaden).

This Friday (11), thermometers should register negative temperatures in the Serra Catarinense, with a risk of frost at dawn. Cities like Campos do Jordão (SP) and Camanducaia (MG) may reach 2°C. In Piatã, in the interior of Bahia, the minimum forecast is 10°C. Capitals like São Paulo, Rio de Janeiro, Belo Horizonte and Brasília will also have cold mornings, with temperatures between 11°C and 13°C. Curitiba should register the lowest minimum among the capitals, with 7°C.

In addition to the cold, fog is expected in the early hours of the day between southern Espírito Santo and northern Rio Grande do Sul, which may impair visibility and cause delays at airports. According to meteorologists, the fog is caused by moisture brought in by winds from the sea.

In the afternoon, however, the scenario changes drastically. The sun predominates and the relative humidity plummets in much of the country's interior, especially in the Central-West, Southeast, and southern North regions. In states like Goiás, São Paulo, Mato Grosso, and Tocantins, the levels can fall below 30%. In northern Mato Grosso do Sul and areas of Mato Grosso, humidity can drop to less than 20%.

Given this situation, experts recommend paying attention to health: it is essential to increase hydration and avoid physical activity in strong sunlight. Low air humidity promotes dryness of the respiratory tract and increases the risk of illness.

In the Northeast and Northern coastal regions, unstable weather persists. Humid winds from the ocean are causing heavy rains in cities like João Pessoa and Recife. In Manaus, Boa Vista, and Macapá, showers are expected throughout the day, with the possibility of thunderstorms.

Temperatures remain high in parts of the country: in Cuiabá (MT), thermometers could reach 34°C on both Saturday and Sunday. Meanwhile, in cities like Salvador (BA) and Maceió (AL), the weather remains unstable, with highs around 26°C to 27°C.

Risk of flooding in the Amazon

Cemaden has issued a warning about the risk of flooding in the state of Amazonas, due to the prolonged flooding of the Negro and Solimões rivers. The warning applies mainly to the cities of Manaus and Parintins, where river levels remain at severe flood levels, both above and below the confluence of the two waterways.

According to the agency, the flooding is affecting the flow of water in urban streams and creeks, a phenomenon known as the "backwater effect." The warning is for... moderate riskThis means there is a possibility of flooding with a significant impact on the population.

Cemaden classifies risks into three levels:

•  Moderate: possibility of the phenomenon having a medium impact.
•  HighHigh chance of occurrence, requiring mobilization of local agencies.
•  Very high: high probability and elevated risk to the population, which may require evacuation and activation of sirens.

The agency recommends increased vigilance from authorities and residents of riverside areas.

What will the weather be like until Sunday (13)

•  South and SoutheastCold mornings, with lows between 7°C and 13°C; sunny and dry afternoons.
•  Central-West and interior of the NortheastStrong sun, low humidity, and heat during the day.
•  North and coastal areas of the Northeast: showers and atmospheric instability.
•  AmazonModerate risk of flooding due to high river levels.

Climate fluctuations reinforce the need to pay attention to weather warnings and take precautions against illness, especially in regions with low humidity or prone to flooding.