Brazil goes on alert on Wednesday (29) with persistent climate shock: rain already exceeds 500 mm and surpasses historical averages, while above-normal heat and humidity below 30% simultaneously advance.

Written by Alisson Ficher

Published on 26/04/2026 at 17:56

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Climatic contrasts mark the end of April with above-average rain in the North and persistent heat in the Central-West, a scenario that keeps meteorologists’ attention and reinforces distinct impacts on the daily lives of regions affected by the irregular behavior of the atmosphere.

Wednesday, April 29, keeps Brazil under significant climatic contrasts, combining persistent rain in the North with above-normal heat in areas of the Central-West, a pattern that reinforces the atmospheric division in the country.

While Belém and Macapá have already surpassed the historical average rainfall for April, parts of the interior continue to experience high temperatures and a risk of relative humidity below 30%, intensifying the feeling of dry weather in the middle of autumn.

According to Climatempo, the accumulated rainfall in the two Amazonian capitals surpassed the monthly average even before the end of April, indicating climatic behavior outside the expected pattern for the period.

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Above-average rain in Northern Brazil

In the North of the country, the presence of the Intertropical Convergence Zone continues to favor the formation of loaded clouds, maintaining an environment conducive to frequent showers and significant volumes of precipitation.

This system, typical of the season, acts with sufficient intensity to reduce periods of stable weather, especially in areas near the coast, where available humidity contributes to recurrent episodes of instability.

In Belém’s case, the sequence of rain reduced sunny spells and raised attention to urban disruptions, especially in regions with a history of flooding and compromised drainage.

According to Climatempo, the saturated soil and high levels of canals and rivers increase the risk of new flooding episodes, should the rain continue with intensity in the coming days.

In Macapá, in turn, the pattern of instability consolidated throughout the month, with frequent precipitation and high humidity reinforcing the perception of a wetter April than usual.

Heatwave in the Central-West raises temperatures

In contrast to the North, part of the Central-West remains under the influence of a heatwave that keeps temperatures above average for the period, even during a typical autumn climatic transition phase.

Climatempo identified the formation of the second heatwave of autumn 2026, active between April 20 and 26, with the possibility of persistence until the end of the month.

The most affected areas include parts of Mato Grosso do Sul, Goiás, and Mato Grosso, as well as nearby regions, where the atmospheric pattern favors the maintenance of heat for several consecutive days.

In these localities, thermometers can register values at least 5°C above average for April, a criterion used to officially characterize a heatwave.

Even outside the most intense core, cities like Goiânia, Cuiabá, and Brasília continue to experience high temperatures, a reflection of a scenario that combines little rain and strong solar incidence.

Furthermore, the low cloud formation contributes to warmer afternoons and a reduction in relative humidity, especially during periods of greatest heating throughout the day.

Atmospheric blocking maintains dry weather

The explanation for this contrast lies in the distinct action of atmospheric systems over Brazilian territory, creating a clear division between areas with excessive rain and regions under persistent heat.

In the northern strip, the high availability of humidity fuels the continuous formation of instabilities, favoring the repetition of episodes of heavy rain throughout the days.

On the other hand, the interior of the country remains under the effect of an atmospheric blocking, which hinders the advance of cold fronts and other systems capable of altering the predominant pattern.

As a result, there is a greater presence of sun, less formation of rain clouds, and maintenance of high temperatures for prolonged periods, especially in the areas most affected by the phenomenon.

This combination of intense heat and dry air requires attention, as humidity levels below 30% can cause respiratory irritation, dry skin, and generalized discomfort.

Even though it is a transition period, the current behavior deviates from what is expected for autumn, which reinforces the atypical nature of the observed conditions.

Brazil ends April with simultaneous extremes

Given this scenario, the difference between regions helps explain why the country experiences such distinct thermal sensations on the same day, reflecting the complexity of atmospheric behavior.

In the North, heat associated with high humidity and frequent rain intensifies the stuffy sensation, while in the Central-West, dry air and predominant sun increase thermal discomfort.

This contrast highlights an end of April marked by a fragmented atmospheric pattern, where different extremes coexist without one system being able to immediately neutralize the other.

As a result, Belém and Macapá may further increase their already above-average accumulations, while the Central-West remains under the influence of persistent heat and low humidity.

Climatempo continues to monitor conditions, as both the rain in the North and the heat in the Central-West may still extend into the last days of the month, maintaining the pattern of simultaneous extremes in the country.

Brazil goes on alert on Wednesday (29) with persistent climate shock: rain already exceeds 500 mm and surpasses historical averages, while above-normal heat and humidity below 30% simultaneously advance.

Climatic contrasts mark the end of April with above-average rain in the North and persistent heat in the Central-West, a scenario that keeps meteorologists’ attention and reinforces distinct impacts on the daily lives of regions affected by the irregular behavior of the atmosphere.

Above-average rain in Northern Brazil

Heatwave in the Central-West raises temperatures

Atmospheric blocking maintains dry weather

Brazil ends April with simultaneous extremes

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Climatic contrasts mark the end of April with above-average rain in the North and persistent heat in the Central-West, a scenario that keeps meteorologists’ attention and reinforces distinct impacts on the daily lives of regions affected by the irregular behavior of the atmosphere.

Above-average rain in Northern Brazil

Heatwave in the Central-West raises temperatures

Atmospheric blocking maintains dry weather

Brazil ends April with simultaneous extremes

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