How Climate Change Affects the Health of Wildlife and Our Pets

Climate change isn't just about rising temperatures; it's a complex web of environmental shifts that directly threaten the health and well-being of animals, both wild and domestic.

By Garret Merkley · Explainer · Jun 13, 2026

Branched from How Climate and Environment Shape Pet Parasite Risks

Quick take

Climate change causes extreme weather, habitat loss, and changes in disease patterns, directly harming wildlife and pets.
Warmer temperatures extend parasite seasons and expand their geographical reach, increasing infection risks for animals.
Disrupted ecosystems lead to food scarcity and stress for wild animals, with cascading effects on pets through shared environments.
Pet owners need to be aware of new health threats and adapt care routines as local climates shift.

Climate change refers to significant, long-term shifts in global or regional climate patterns. These changes, primarily driven by human activities, lead to higher average temperatures, more frequent extreme weather events, and altered ecosystems. For wildlife and pets, this translates into direct health challenges like heat stress and habitat loss, alongside indirect threats such as increased disease transmission and food scarcity.

How Environmental Shifts Impact Animal Health

Climate change affects animals through several interconnected pathways. Rising global temperatures directly contribute to heatstroke and dehydration, particularly in species not adapted to warmer climates. Extreme weather events like floods, droughts, and wildfires destroy habitats, forcing animals to migrate, often into less suitable areas, or leading to direct injury and death. This habitat disruption also reduces access to vital resources like food and water.

Beyond direct physical threats, climate change alters the dynamics of diseases and parasites. Warmer temperatures and changing precipitation patterns create ideal conditions for disease vectors like mosquitoes and ticks to thrive for longer seasons and expand into new geographical regions. This means pets and wildlife are exposed to diseases like Lyme disease, heartworm, and West Nile virus more frequently and in places where they were previously uncommon. Ecosystem changes can also stress animals, weakening their immune systems and making them more susceptible to illness.

Specific Impacts on Wildlife and Pets

For wildlife, these impacts manifest as disrupted breeding cycles, reduced access to food sources due to altered plant growth or prey availability, and increased competition with other species forced into new territories. Polar bears, for example, suffer from melting sea ice, which limits their hunting grounds. Many species face extinction risks as their environments change faster than they can adapt.

Our domestic pets are not immune. They share the same outdoor environments as wildlife, making them vulnerable to the same expanding parasite and disease risks. Heatwaves pose a significant danger, especially to brachycephalic (flat-faced) breeds. Changes in local flora due to altered climate can increase allergen exposure, leading to more severe seasonal allergies. Furthermore, extreme weather events can cause stress and anxiety in pets, and in severe cases, lead to displacement or injury if owners are forced to evacuate.

Understanding these impacts is crucial because the health of wildlife and pets is deeply intertwined with environmental health. A decline in wildlife populations can disrupt entire ecosystems, affecting everything from pest control to pollination. For pet owners, being aware of climate-driven health risks allows for proactive measures, such as year-round parasite prevention, adapting exercise schedules during heatwaves, and preparing for extreme weather. Ultimately, protecting our planet's health is essential for the well-being of all living creatures, including those we share our homes with.

Protecting Your Pet in a Changing Climate

Maintain year-round parasite prevention, even in winter, as vector seasons extend.
Be aware of local weather forecasts and adjust outdoor activities during heatwaves or extreme cold.
Ensure your pet has access to fresh water and shade, especially during warm months.
Stay informed about new disease risks emerging in your region.
Have an emergency plan for your pet in case of natural disasters.

Are all pets equally affected by climate change?

No. Factors like breed (e.g., brachycephalic dogs are more prone to heatstroke), age, underlying health conditions, and lifestyle (indoor vs. outdoor) influence a pet's vulnerability. Wildlife species also vary greatly in their ability to adapt to environmental changes.

What specific diseases are increasing due to climate change?

Diseases spread by vectors like ticks and mosquitoes are particularly concerning. This includes Lyme disease, anaplasmosis, ehrlichiosis (tick-borne), and heartworm, West Nile virus, and Eastern Equine Encephalitis (mosquito-borne). Some fungal diseases are also expanding their range.

Can climate change affect pet food availability or safety?

While less direct, climate change can impact agricultural yields, potentially affecting ingredient availability and prices for pet food. More critically, extreme weather events can disrupt supply chains. There's also a risk of increased mycotoxin contamination in crops due to altered humidity and temperature, which can affect pet food safety.

What can I do to help wildlife impacted by climate change?

Supporting conservation efforts, reducing your carbon footprint, creating wildlife-friendly habitats in your yard (e.g., native plants, water sources), and avoiding the use of harmful pesticides can all make a difference. Report unusual wildlife behavior or illness to local authorities.

Sources

Centers for Disease Control and Prevention (CDC)
National Oceanic and Atmospheric Administration (NOAA)
American Veterinary Medical Association (AVMA)