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A new heat wave is expected to hit Brazil this weekend, with temperatures near 40 °C in several regions. According to Meteored, the phenomenon may persist for weeks and extend throughout April, signaling a warmer than normal autumn and winter.
A new heat wave is expected to raise temperatures to nearly 40 °C in several regions of Brazil this weekend, despite autumn having just begun. According to Meteored’s forecast, the intensity of the heat is expected to increase throughout the next week, with cities in Western Paraná and Rio Grande do Sul recording highs of up to 36 °C between Saturday afternoon (28) and Sunday (29).
The new heat wave may prove persistent and also affect Mato Grosso do Sul, São Paulo, as well as Argentina, Paraguay, and Uruguay in early April. It appears that the high temperatures may last for weeks and extend throughout April, indicating that the Brazilian autumn will bear little resemblance to what is typically expected for the season.
When will the new heat wave hit Brazil
image: meteored
The new heat wave is expected to hit Brazil this weekend, between Saturday (28) and Sunday (29). The first regions affected will be Western Paraná and Rio Grande do Sul, where highs may reach 36 °C. Starting next week, the trend is for the heat to intensify across the entire Central-South region of the country.
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The situation is caused by the formation of a bubble of warm air over the continent, a phenomenon that significantly raises temperatures above the average for the period.
In Southern Brazil, temperatures are expected to be up to 3 °C above the climatological average, and the same pattern is expected to repeat in Mato Grosso do Sul and São Paulo.
The new heat wave is also expected to affect Argentina, Paraguay, and Uruguay in early April, constituting a continental-scale event.
How long is the new heat wave expected to last
According to Meteored, the new heat wave is expected to intensify between March 30 and April 6 over the Central-South region of Brazil. However, the scenario may extend throughout April, resulting in consecutive weeks of elevated temperatures in the midst of autumn.
This persistence of off-season heat is unusual but not unexpected in the current climatic context. The new heat wave signals the possible arrival of a warmer than normal winter, which concerns meteorologists and may have implications for agriculture, energy supply, and public health in the most affected regions.
The role of El Niño in the new heat wave and in the climate of 2026
The formation of an El Niño in 2026 is expected to directly influence the climate in Brazil and contribute to making episodes like the new heat wave more frequent. Among the main characteristics of El Niño is the increase in average temperatures in the South, parts of the Southeast, and Mato Grosso do Sul.
The climatic phenomenon alters atmospheric circulation patterns on a global scale and tends to raise temperatures in various regions of the planet. In Brazil, the influence of El Niño reinforces the trend of an autumn with above-average temperatures and reduces the likelihood of intense cold in the coming months.
The combination of El Niño and the current new heat wave indicates that the country is likely to face a prolonged period of elevated temperatures before any significant relief arrives.
When should the cold arrive in Brazil
Despite the new heat wave, the first episode of more intense cold is expected to occur only in the second half of May. During this period, temperatures near 10 °C are forecasted in areas of Central-South Brazil, especially with the arrival of cold air masses of polar origin.
Before that, moderate temperature drops are expected in the second half of April, but nothing that would characterize a significant change in the heat pattern.
Meteored indicates that autumn is expected to have above-normal average temperatures in most of the country, which means that the current new heat wave may be just the first of a series of warm episodes in the coming months.
How the new heat wave affects the daily life of the population
Prolonged episodes of intense heat like this new heat wave directly affect health, energy consumption, and agricultural productivity. With temperatures near 40 °C, the risk of dehydration, heat stroke, and worsening respiratory and cardiovascular diseases increases, especially among the elderly and children.
Electricity consumption tends to rise with the intensive use of air conditioning and fans, putting pressure on the electrical system during a period when hydroelectric reservoirs begin to receive less water.
In agriculture, the new heat wave may impact crops sensitive to thermal stress, especially in regions of the South and Central-West. Maintaining adequate hydration, avoiding sun exposure between 10 AM and 4 PM, and keeping up with weather updates are basic recommendations for facing the period.
The new heat wave that begins to affect Brazil this weekend is expected to last for weeks and may extend throughout April, with temperatures near 40 °C in several regions. The influence of El Niño and the pattern of above-average temperatures for autumn indicate that intense heat is here to stay in the coming months.
With information from ndmais.
How is the heat in your region? Have you felt the temperatures rising unusually for this time of year? Leave your opinion in the comments and share with those who need to prepare for the coming days.
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