The summer of 2024 remained etched in the memory of many Brazilians: heat waves with temperatures exceeding 40°C in several capitals, historic droughts in the Rio Negro that left riverside communities stranded, and devastating floods in Rio Grande do Sul that claimed more than 150 lives and displaced hundreds of thousands of people. These events were not isolated coincidences — they are symptoms of a phenomenon advancing at an accelerated pace and affecting, in very concrete ways, the daily life of each Brazilian.
Brazil occupies a peculiar position in this global scenario. It is one of the countries with the greatest biodiversity on the planet, home to the world’s largest tropical forest and possesses immense water resources. At the same time, it is highly vulnerable to climate change — and impacts are already visible from north to south, from the northeastern semi-arid region to the gaucho plains. Understanding what is happening, why, and what each of us can do is more urgent than ever.
This article was written to present an honest and evidence-based overview of climate change in Brazil, focusing on real impacts affecting regions, ecosystems, and people. But more than just showing the problem, we want to offer practical pathways — because individual action, combined with collective action, still makes a difference.
Global Warming and Brazil: A Confirmed Vulnerability
The Intergovernmental Panel on Climate Change (IPCC), in its most recent reports, classifies tropical South America — which includes most of Brazil — among the world’s highest climate risk regions. This is due to a combination of factors: economic dependence on climate-sensitive sectors (such as agriculture and hydroelectric energy), social inequality that limits the adaptive capacity of vulnerable populations, and ecosystem degradation that functions as natural buffers.
Global average temperature has already risen approximately 1.2°C to 1.3°C relative to pre-industrial levels, according to the IPCC. In Brazil, some regions register increases above the global average. The northeastern semi-arid region, for example, experiences longer and more intense drought cycles. The Pantanal biome has recorded, in recent years, the largest fires in its recent history. And the Amazon is approaching an ecological tipping point that scientists call “savanization.”
Amazon: The Forest That Regulates the Climate of the Continent
The Amazon rainforest is not merely an ecological heritage — it is a climate infrastructure. Through tree transpiration, the Amazon generates so-called “flying rivers”: moisture currents that transport water vapor and distribute rainfall across much of South America, including food-producing regions in the Southeast and Center-West.
Research from the National Institute of Amazonian Research (INPA) and researchers such as Antonio Donato Nobre indicate that significant portions of the eastern and southeastern Amazon already emit more carbon than they absorb — a concerning inversion of their historical function as a carbon sink. This is partly caused by deforestation, which weakens the forest’s capacity to recover and maintain its hydrological cycle.
What this means in practice:
- Irregular rainfall in regions that depend on flying rivers
- Increased frequency of droughts and dry spells affecting crops in the Center-West and Southeast
- Growing risk of forest fires during dry periods
The good news is that deforestation in the Legal Amazon has shown significant reduction between 2023 and 2025, according to INPE data, after years of increase. Active protection of the forest remains one of the most effective climate actions available to Brazil.
Extreme Events: When Climate Becomes Humanitarian Crisis
Extreme climate events are today the most visible and painful face of climate change in Brazil. They do not affect everyone equally: low-income populations, residents of risk areas, and rural communities are the most vulnerable.
Floods and Landslides in the South and Southeast
The floods of April and May 2024 in Rio Grande do Sul were considered the largest climate disaster in the state’s history. More than 400 municipalities were affected, with flooding that destroyed bridges, highways, and homes. The tragedy exposed the lack of drainage infrastructure, urban densification in risk areas, and the absence of efficient warning systems in many municipalities.
Drought and Extreme Heat in the North and Northeast
In 2024, the Rio Negro reached its lowest level ever recorded in its history, compromising navigation and access by riverside communities to food, water, and health services. The 2024 Amazon drought was associated with a combination of El Niño and warming of the North Atlantic — a pattern that tends to repeat more frequently.
In the northeastern semi-arid region, the phenomenon is not new, but the intensity and duration of droughts have increased. Programs like the Cistern and access to drinking water remain fundamental to the resilience of these populations.
Agriculture and Food Security Under Pressure
Brazil is one of the world’s largest food exporters, and agriculture represents a significant portion of national GDP. This economic dependence makes the country especially exposed to climate change.
Embrapa has monitored how changes in rainfall, heat, and frosts affect strategic crops such as soybeans, corn, coffee, and sugarcane. Projections by researchers linked to the institution indicate that, depending on the global emissions scenario adopted, various traditional cultivation regions could become less productive in the coming decades, while new regions may gain agricultural suitability — requiring constant adaptation by farmers and the sector as a whole.
Impacts already observed include:
- Increased rainfall variability, making planting planning difficult
- Greater pressure from pests and diseases at higher temperatures
- Loss of native pollinators, essential for various crops
- Risks to coffee cultivation in traditional regions of Minas Gerais and São Paulo
Electrical Energy: The Hydric Dependency at Risk
Brazil has an electrical matrix that historically was considered “clean,” thanks to the predominance of hydroelectric power. However, this hydric dependence has become a point of vulnerability in a context of more frequent droughts.
The water crises of 2001 and 2021 showed how rainfall scarcity can compromise electrical supply. ANEEL and the National Electric System Operator (ONS) continuously monitor reservoir levels — and in years of severe drought, the country needs to activate thermoelectric plants using fossil fuels, which increases emissions and energy costs.
Diversification of the matrix with solar and wind energy has advanced significantly. Brazil today is one of the world’s largest wind energy producers, and photovoltaic solar energy grew expressively between 2020 and 2025. This diversification is both an economic and climate response.
Biodiversity at Risk: More Than Species, These Are Ecosystem Services
The International Union for Conservation of Nature (IUCN) points out that climate change is today one of the main threats to global biodiversity, alongside habitat destruction. In Brazil, biomes such as the Cerrado — the second-largest national biome and one of the most biodiverse on the planet — have already lost more than half of their original vegetation over the decades, and warming adds pressure to what remains.
The loss of biodiversity is not merely an aesthetic or sentimental issue. Each extinct species may represent the breakdown of an ecological relationship — between pollinators and plants, between predators and prey, between fungi and roots. These ecosystem services sustain agriculture, water purification, and local climate regulation.
What Each of Us Can Do Today
Faced with a problem of global scale, individual action may seem insufficient. But everyday choices, combined, create culture, influence markets, and pressure public policy. Here are concrete attitudes you can adopt now:
- Reduce food waste — a significant portion of methane emissions comes from organic waste in landfills. Plan meals, freeze leftovers, and shop consciously.
- Prefer public transportation, bicycles, or walking whenever possible — especially in cities with heavy congestion.
- Reduce red meat consumption — bovine livestock is one of the largest sources of greenhouse gas emissions in Brazil.
- Save energy at home — turn off devices on standby, prefer efficient appliances, and consider solar water heating.
- Reuse before discarding — products that remain in use longer consume fewer resources. See practical ideas at Reusing packaging: creative ideas worth trying.
- Engage politically — vote, monitor your municipalities and states’ decisions on environmental licensing, mobility plans, and waste management.
- Support local and organic producers — short production chains have lower carbon footprints and strengthen family farming.
- Plant trees and protect urban green areas — even one tree on a sidewalk contributes to the urban microclimate.
Conclusion: Acting Now Still Makes a Difference
Climate change in Brazil is real, documented, and already causing concrete impacts — in forests, cities, countryside, and the lives of millions of people. Ignoring this fact is not a responsible option. But nor is it useful to fall into immobility or hopelessness.
Brazil has extraordinary resources to face this challenge: the world’s largest tropical forest, immense potential in renewable energy, agriculture that can evolve toward more sustainable standards, and an active civil society. The path requires ambitious public policies, investment in science and technology, and — yes — the conscious participation of each citizen.
You don’t need to change everything at once. Start with one choice. Then another. Share what you learn. Talk with those around you. Small actions create waves. And in climate, as in politics and culture, waves can change the direction of things.
To deepen your sustainable journey, also check out our content on climate change in Brazil and what’s at stake — in English, to share with whoever you want to reach beyond borders.
The planet doesn’t ask for perfection. It asks for presence and intention. And you’re already here.
