The most intense cold of April 2026 has a date set for Mato Grosso do Sul, with lows below 8°C in Campo Grande between Monday and Tuesday, when the polar mass that has already hit the South advances through the Southern Cone of the state and surprises a region that was still registering heat above 30°C the previous weekend.

Written by Valdemar Medeiros

Published on 27/04/2026 at 08:31

Be the first to react!

Polar mass advances over Mato Grosso do Sul, brings temperatures below 8°C and brings risk of frost and impacts on health and agriculture.

According to Climatempo, the most intense cold air mass of polar origin recorded in 2026 begins to enter through Rio Grande do Sul on the night of Sunday, April 26, progressively advancing north in the following days. The most severe core remains in the South on Monday and Tuesday, but the south and southwest of Mato Grosso do Sul enter the direct path of the polar air as the system advances.

The Weather and Climate Monitoring Center (Cemtec) has already issued alerts for a sharp decline in temperature and risk of frost in municipalities such as Amambai, Ponta Porã, Aral Moreira, Coronel Sapucaia, Iguatemi, Naviraí, and Paranhos.

Climatology of Mato Grosso do Sul explains why cold in April is considered an out-of-pattern event

To understand the impact of this episode, it is necessary to observe the typical climate pattern of the state. Mato Grosso do Sul has a well-defined climate regime, with hot and rainy summer between November and April and dry and milder winter from May to October. In April, temperatures still remain high.

ARTICLE CONTINUES BELOW

Geography and topography facilitate the advancement of polar masses through the south of the state

The geographical configuration of Mato Grosso do Sul contributes to the entry of cold air in specific episodes.

The south-north axis and the relatively flat terrain allow polar masses to advance with less barrier when they present greater intensity.

Regions near the border with Paraguay, such as Ponta Porã and Iguatemi, are at a similar latitude to cities in the South of Brazil and can record significantly lower temperatures when the atmospheric system is strong.

Civil Defense and Inmet issue alert for drop greater than 10°C in less than 24 hours and risk of frost

The weather alerts indicate two main risks for the state. The first is the sharp decline in temperature, with drops greater than 10°C in less than 24 hours. The second is the risk of frost in at least 14 municipalities in the extreme south.

Among them are Amambai, Aral Moreira, Coronel Sapucaia, Eldorado, Iguatemi, Itaquiraí, Japorã, Laguna Carapã, Mundo Novo, Naviraí, Paranhos, Ponta Porã, Sete Quedas, and Tacuru.

Impact of cold on agriculture may affect second crop corn in critical development phase

Mato Grosso do Sul is one of the main producers of second crop corn in Brazil. In April, part of the crops is still in the grain filling phase, considered sensitive to low temperatures.

The most intense cold of April 2026 is scheduled for Mato Grosso do Sul, with minimums below 8°C in Campo Grande between Monday and Tuesday, when the polar mass that has already brought down the South advances through the Southern Cone of the state and surprises a region that still recorded heat above 30°C the previous weekend — Polar mass advances over Mato Grosso do Sul

Frosts with temperatures below 3°C for prolonged periods can cause irreversible damage to plants, compromising productivity.

Campo Grande registers abrupt temperature drop and enters risk zone for public health

Campo Grande is located in an intermediate zone, receiving influence from polar air when the system is more intense.

The forecast indicates minimums between 8°C and 12°C, with a drop greater than 20°C compared to the temperatures recorded in the previous days.

This type of sudden variation has a direct impact on health, especially in populations not adapted to the cold.

Temperature oscillations increase the risk of respiratory and cardiovascular diseases

Medical studies indicate that rapid temperature changes are more dangerous than isolated extreme cold.

The sudden drop favors the worsening of respiratory diseases, such as bronchitis and pneumonia, in addition to increasing the risk of cardiovascular events. Small children and the elderly are the most vulnerable groups.

The Pantanal has its own climatic characteristics due to the large presence of water and vegetation. This condition can soften minimum temperatures compared to drier regions in the southern part of the state.

However, high humidity intensifies the thermal sensation, making the cold more uncomfortable for humans and animals.

Humid cold in the Pantanal may increase thermal stress in herds and affect productivity

In prolonged episodes of humid cold, cattle may show increased energy expenditure and greater susceptibility to respiratory problems.

These factors directly impact the productivity and health of herds, especially in extensive systems.

Climate models point to a scenario of greater thermal variability. Extreme heat events, with temperatures above 40°C, are expected to alternate with more intense incursions of polar air.

This increasing amplitude requires constant adaptation of productive systems and urban infrastructure.

Now we want to know: is Mato Grosso do Sul prepared to handle increasingly extreme climatic events?

The advance of polar masses outside the expected period reinforces the trend of increasing climatic variability.

In your view, is the state prepared to face these changes or is the risk likely to grow in the coming years?

Polar mass advances over Mato Grosso do Sul, brings temperatures below 8°C and brings risk of frost and impacts on health and agriculture.

Climatology of Mato Grosso do Sul explains why cold in April is considered an out-of-pattern event

Geography and topography facilitate the advancement of polar masses through the south of the state

Civil Defense and Inmet issue alert for drop greater than 10°C in less than 24 hours and risk of frost

Impact of cold on agriculture may affect second crop corn in critical development phase

Campo Grande registers abrupt temperature drop and enters risk zone for public health

Temperature oscillations increase the risk of respiratory and cardiovascular diseases

Humid cold in the Pantanal may increase thermal stress in herds and affect productivity

Now we want to know: is Mato Grosso do Sul prepared to handle increasingly extreme climatic events?

The Soviet Union spent 22 years drilling into the Earth’s crust and reached a depth of 12,262 meters — they found water where it was thought impossible, hydrogen bubbling from the rock, granite that is 2.7 billion years old, and temperatures of 180 degrees that melted the drill bits.

Egypt wants to draw 10 million cubic meters of water from the Nile per day into the desert, irrigate a new agricultural frontier, and build a city where there is currently only sand.

Norway is drilling 27 kilometers of rock 392 meters below the bottom of a fjord to build the world’s largest and deepest underwater road tunnel — when completed, a 21-hour journey will be reduced to 10.

Chinese engineers begin filling a 217-meter dam at an altitude of 3,000 meters and prepare a 2,240 MW hydroelectric power plant to integrate hydropower, solar, and wind energy in the upper Jinsha.

A German architect built a cylindrical house in 1994 that rotates to follow the sun throughout the day, generates 5 times more energy than it consumes, and was the world’s first energy-positive house.

An astronaut spent 340 days in space while his twin brother stayed on Earth, and NASA found a “rejuvenating” effect, genes, microbiome, cognition, and immune system that revealed the biological cost of living outside the planet.

A single solar storm can knock out satellites, wipe out GPS, and leave 40 million people without power for months — and the transformers that protect the grid take 4 years to manufacture.

Sydney is erecting the world’s tallest wooden skyscraper — it’s 40 stories of hybrid timber that sequester carbon instead of emitting it, and the tower is expected to be completed as early as 2026.

While sanitation in Brazil serves only 55% of the population and discharges sewage into rivers, Singapore already recycles 100% of the water it consumes and has transformed sewage into award-winning potable water.

The Sagrada Família in Barcelona has completed its main structure after 144 years of construction — exactly 100 years after Gaudí’s death, and the tallest tower reaches 172 meters.

After mapping more than 200 million proteins, artificial intelligence enters the race to accelerate drugs, vaccines, and enzymes against plastic and CO₂, opening an era in which molecules can be designed on demand.

Polar mass advances over Mato Grosso do Sul, brings temperatures below 8°C and brings risk of frost and impacts on health and agriculture.

Climatology of Mato Grosso do Sul explains why cold in April is considered an out-of-pattern event

Geography and topography facilitate the advancement of polar masses through the south of the state

Civil Defense and Inmet issue alert for drop greater than 10°C in less than 24 hours and risk of frost

Impact of cold on agriculture may affect second crop corn in critical development phase

Campo Grande registers abrupt temperature drop and enters risk zone for public health

Temperature oscillations increase the risk of respiratory and cardiovascular diseases

Humid cold in the Pantanal may increase thermal stress in herds and affect productivity

Now we want to know: is Mato Grosso do Sul prepared to handle increasingly extreme climatic events?

The Soviet Union spent 22 years drilling into the Earth’s crust and reached a depth of 12,262 meters — they found water where it was thought impossible, hydrogen bubbling from the rock, granite that is 2.7 billion years old, and temperatures of 180 degrees that melted the drill bits.

Egypt wants to draw 10 million cubic meters of water from the Nile per day into the desert, irrigate a new agricultural frontier, and build a city where there is currently only sand.

Norway is drilling 27 kilometers of rock 392 meters below the bottom of a fjord to build the world’s largest and deepest underwater road tunnel — when completed, a 21-hour journey will be reduced to 10.

Chinese engineers begin filling a 217-meter dam at an altitude of 3,000 meters and prepare a 2,240 MW hydroelectric power plant to integrate hydropower, solar, and wind energy in the upper Jinsha.

A German architect built a cylindrical house in 1994 that rotates to follow the sun throughout the day, generates 5 times more energy than it consumes, and was the world’s first energy-positive house.

An astronaut spent 340 days in space while his twin brother stayed on Earth, and NASA found a “rejuvenating” effect, genes, microbiome, cognition, and immune system that revealed the biological cost of living outside the planet.

A single solar storm can knock out satellites, wipe out GPS, and leave 40 million people without power for months — and the transformers that protect the grid take 4 years to manufacture.

After mapping more than 200 million proteins, artificial intelligence enters the race to accelerate drugs, vaccines, and enzymes against plastic and CO₂, opening an era in which molecules can be designed on demand.

A particle smaller than a human hair accelerates with light and promises to transform ocean uranium extraction into a giant bet to power China’s nuclear reactors without relying solely on the old passive collection method.

The world’s most powerful telescope was switched on in Chile and may finally solve the mystery of the ninth planet that scientists believe has been hidden in the Solar System for billions of years.

Discovery in Africa scares even scientists: a study published on April 23 reveals that the crust in Turkana has become so thin that it could pave the way for the continent’s division and the emergence of an ocean in the future, in a gigantic geological transformation.

A single solar storm can knock out satellites, wipe out GPS, and leave 40 million people without power for months — and the transformers that protect the grid take 4 years to manufacture.

Sydney is erecting the world’s tallest wooden skyscraper — it’s 40 stories of hybrid timber that sequester carbon instead of emitting it, and the tower is expected to be completed as early as 2026.

While sanitation in Brazil serves only 55% of the population and discharges sewage into rivers, Singapore already recycles 100% of the water it consumes and has transformed sewage into award-winning potable water.

The Sagrada Família in Barcelona has completed its main structure after 144 years of construction — exactly 100 years after Gaudí’s death, and the tallest tower reaches 172 meters.

After mapping more than 200 million proteins, artificial intelligence enters the race to accelerate drugs, vaccines, and enzymes against plastic and CO₂, opening an era in which molecules can be designed on demand.