When we think of climate change, most of us think of melting glaciers, extreme weather, or animal migration. However, few people realize that one of the most vulnerable organs in the climate crisis is the human brain. Scientists are increasingly pointing out that rising temperatures, air pollution, stress from extreme weather and food insecurity they have direct impacts on mental health, behavior and even the occurrence of neurological disorders.

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🔥 Heat and mental health

⛔ Cognitive performance

At high temperatures (above 30–35 °C) the following decreases:

• ability concentrations,
• memory functions,
• information processing speed.

Studies show that schoolchildren, students, and manual workers perform worse during hot weather, especially if they do not have access to air-conditioned environments.

😔 Increase in depression and anxiety

Elevated temperatures are associated with worsening symptoms depression and anxiety disorders, especially in vulnerable groups – the elderly, young adults and lonely people. Prolonged heat stress can alter levels of neurotransmitters such as serotonin a dopamine, which is related to mood and emotional stability.

😡 Increase in aggression and violence

Statistics from several countries show that during heat waves, the number of:

• domestic violence,
• verbal and physical conflicts,
• murderous attacks.

Scientists believe that heat reduces the brain's ability to regulate impulsive behavior and increases irritability.

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🧬 Air Pollution: A Hidden Neurotoxin

Increased emissions of greenhouse gases and dust particles (PM2.5, ozone) have not only climatic but also neurological consequencesFine particles penetrate through the nose into the brain and can cause:

• inflammatory reactions,
• disruption of the blood-brain barrier,
• oxidative stress in brain tissue.

🧓 Risk of dementia and Alzheimer's disease

Research from the US and Europe suggests that people living in areas with polluted air are more likely to develop dementia, especially Alzheimer's diseaseChronic exposure to particulate matter from transportation and fossil fuel combustion is associated with faster loss of brain volume a decline in cognitive abilities.

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👶 Children and pregnant women: The most vulnerable

🧠 Brain development

In children born in polluted or extremely hot environments, the following have been recorded:

• reduced IQ,
• attention deficit disorder (ADHD),
• autism spectrum disorders.

They are particularly sensitive fetal stages – extreme heat during pregnancy increases the risk premature birth, low birth weight and developmental brain disorders.

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🏥 Increase in neurological diseases

According to a growing body of research, climatic factors increase the incidence or worsen the course of the following diseases:

Disease	Climate connection
Migraines	Increase in seizures during heat and pollution
Epilepsy	Higher likelihood of seizures during heat stress
Multiple sclerosis	Relapses during summer heat waves
Cerebral strokes (infarctions)	Higher incidence during extremely hot days

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🧭 What can we do about it?

🔹 Individually:

• Watch temperature in the home, use shading, ventilation, or air conditioning.
• Increase movement during the cooler hours of the day.
• Take care of your mental health – relaxation, hydration, quality sleep.

🔹 Systemically:

• Support green infrastructure in citieswhich cools the environment.
• Press on reducing emissions and switching to clean energy sources.
• Introduce public health policies that take climate extremes into account.

The climate crisis is not just an environmental or economic problem. It also affects our brain, mind, and behavior. As the frequency of extremes increases, so does the need to protect mental and neurological health. And while individuals can take precautions, a real solution requires collective and systemic changes.

➡️ If we protect the climate, we also protect the brain – yours and future generations. JRi