It is extremely easy to think that climate change is something that happens “outside”: the warming temperatures, melting ice caps, and habitat destruction. That statement is only half-right, and it is because of a reason that you would not have even thought possible.

The change in the Earth’s climate actually directly affects us. Yes, us. That’s climate change, and it’s quietly reshaping human health, both physical and mental.

Climate change isn’t just an environmental issue anymore; it’s a public health emergency. As global temperatures rise, so do hospital visits. Heat waves that used to come once a decade now arrive every summer, sending thousands to emergency rooms for heat exhaustion and dehydration.

Wildfires are choking cities in smoke, worsening asthma and heart conditions. Even mosquito-borne diseases like malaria and dengue fever are spreading to places they’ve never been before, and mental health issues are on the rise.

This will only get worse as the effects of climate change become greater in magnitude. So the real question is: how is the changing climate affecting our mental/physical health, and what can we do to mitigate this before it is too late?

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How Climate Change Impacts Physical Health

We usually associate health risks with things like poor diet, smoking, or lack of exercise. But now, the climate itself has become one of the biggest threats to our well-being.

One of the most felt effects of climate change, rising global temperatures, is putting immense pressure on our bodies, especially during extreme heat waves. According to the World Health Organization, between 2000 and 2019, heat-related deaths among people over 65 increased by more than 50%. Cities like Paris and London are warming at a record pace, making the population living there more susceptible to the dangers of heat stroke.

One of the more subtle ways climate change affects our health is by reshaping the way diseases spread. The increase in magnitude of precipitation, along with the everlasting warming of the Earth, is causing mosquitoes carrying illnesses like malaria, dengue fever, and Zika virus to expand into regions that were once too cold for them.

A problem we thought was confined to the tropical areas, "there are too many mosquitoes there,” is now literally at our doorstep. Scientists have found that by 2050, half of the world’s population could be at risk of mosquito-borne diseases. In the United States, cases of West Nile Virus and Lyme disease have already increased dramatically as warmer climates allow carriers to thrive for longer periods.

Wildfires and air pollution are slowly becoming more deadly thanks to the rising temperatures that trap pollutants like ozone and fine particles closer to the ground, creating smog that worsens asthma, lung disease, and heart problems. In 2023, wildfire smoke from Canada blanketed cities across the U.S., turning skies orange and causing air quality to plummet to concerning levels for millions. Studies show that breathing in this polluted air can shorten life expectancy and increase hospital visits for respiratory and cardiovascular issues.

Even pollen’s nuisance effects on our health are getting enhanced due to climate change. If you felt that in recent years, pollen has become more of an issue for your health, you are actually correct. Rising temperatures and a reduction in frost days lengthen the growing season for many plants. Longer seasons mean that plants begin producing pollen earlier in the spring and continue later into the fall.

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The Overlooked Impact: Mental Health

An often lesser recognized impact of climate change is actually on human mental health. Subconsciously, the weather actually has a significant influence on how our minds and mood behave daily. Imagine waking up to a grim, foggy day compared to a warm and sunny day. You don’t realize it, but your mood immediately gets affected the moment you wake up.

Due to the increasing rate of natural disasters and the destruction that ensues, many people across the globe develop a condition called “eco-anxiety.” This isn’t just a buzzword. According to the American Psychological Association, nearly 70% of adults in the U.S. report feeling anxious or worried about climate change. Natural disasters like hurricanes, floods, and wildfires not only destroy homes but also impact people emotionally. Once-in-a-lifetime weather events such as Hurricane Katrina and the Australian bushfires of 2019 were correlated with doubled rates of post-traumatic stress disorder (PTSD), especially in younger people.

Well, sadly, these once-in-a-lifetime events are now becoming a once-in-a-decade occurrence. This means increased mental turmoil among people across the globe due to the weather.

Increased heat also plays a big part in mental health: Patients with mental illness are especially susceptible to heat. Suicide rates fluctuate with the weather, increasing in high temperatures. It indicates potential climate change impacts on depression and mental health.

Dementia is a risk factor for hospitalization and death during heat waves. Hot weather poses a risk for patients with severe mental illness like schizophrenia, as medications may affect temperature regulation or induce hypothermia.

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Protecting Our Health in a Changing Climate

Most importantly, amidst all these concerns for our health, knowing how to prevent our health from being affected by the climate is key. These steps may seem small, but when millions of people do them, the impact is enormous.

Here are a few ways you can stay healthy and resilient amidst the changing climate:

• Stay cool and hydrated: on hotter days, drink water often, avoid being outside during peak heat hours (usually between 12 p.m. and 4 p.m.), and spend time in shaded or air-conditioned areas. Even light-colored clothing helps your body stay cooler. Most importantly, know your limits when it comes to the heat.
• Improve indoor air quality: keep windows closed during smoky or polluted days, use air purifiers if possible, and add houseplants (natural air filter).
• Use sustainable transport: walking, biking, or using public transit not only reduces your carbon footprint but also keeps you physically active.
• Eat more plant-based foods: shifting toward a diet with less meat and more fruits, vegetables, and grains supports a healthier heart and reduces emissions from livestock and food production.
• Prioritize mental health: take breaks from constant climate news, spend time outdoors in nature, and talk about your feelings.
• Be part of the solution: join local clean-up efforts, plant trees, or volunteer for environmental programs in your community

Image Credit: Vadim Kaipov from Unsplash

At the end of the day, climate change is not just a “weather issue”; it actually directly affects our cities, our homes, and most of all, our bodies. The air we breathe, the food we eat, and the water we drink have all been shaped by the constantly changing environments.

By understanding the wide range of impacts, we can act ahead and prepare ourselves and our communities to become more resilient. Staying cool, choosing cleaner transportation, eating smarter, and supporting green policies all matter more than we think. Every small change adds up. After all, continuing to pollute the environment indirectly pollutes us as well.