Wildfire Smoke and Cats: How to Create a Cleaner, More Comfortable Indoor Space

Cleaner Air & Home

During wildfire season, outdoor air quality can change quickly — and smoke does not always stay outside. For homes shared with cats, smoky days may mean spending more time indoors and paying closer attention to the air inside the home.

Wildfire smoke can irritate the eyes and respiratory system, and animals with existing heart or lung conditions may be more vulnerable to poor air quality.

The goal is not to create a perfectly sealed environment. Instead, a few practical changes can help reduce smoke exposure and make the indoor space more comfortable for both cats and the people who live with them.

Science-based cat care · Reviewed September 22, 2026

A cat resting indoors during wildfire smoke conditions in a warm modern home.

1. Check the Air Quality Before Opening the Windows

A clear-looking sky does not always mean the air is clear. Before opening windows or spending extended time outdoors, check your local Air Quality Index (AQI) and any wildfire smoke advisories in your area.

Tools such as AirNow and its Fire and Smoke Map can help you see current PM2.5 conditions and smoke impacts near your location. When smoke levels are elevated, keeping cats indoors as much as practical can help limit unnecessary exposure.

A cat indoors while a pet owner checks local wildfire smoke and air quality conditions.

2. Reduce the Amount of Outdoor Smoke Entering Your Home

On smoky days, keep doors and windows closed when possible. If your home has air conditioning or an HVAC system, use settings that minimize outdoor-air intake and recirculate indoor air when appropriate for your system.

It can also help to choose one room or area where your cat already feels comfortable and focus on keeping that space calm, cool, and as free from additional particles as practical.

3. Make Indoor Air Care Part of Your Smoke-Day Routine

Portable air cleaners can be one part of an indoor air-quality strategy. They are designed to filter air within a room or defined area and can help reduce indoor fine-particle pollution when used alongside other smoke-reduction measures.

For pet homes, placing an air purifier in a room where your cat naturally spends time can make air care easier to incorporate into the household routine. Keep air intakes and outlets unobstructed and follow the operating and filter-maintenance instructions for your specific unit.

Air filtration is only one part of managing indoor air quality. An air purifier cannot remove every pollutant or replace other smoke-reduction steps.

A cat resting near an air purifier in a cleaner indoor space during smoky conditions.

Learn more: Do Air Purifiers Help With Cat Hair and Dander?

4. Avoid Adding More Particles Indoors

When wildfire smoke is already affecting outdoor air, everyday indoor activities can add even more particles to the home.

During smoky periods, avoid or reduce activities such as burning candles or incense, using fireplaces or woodstoves, smoking or vaping indoors, aerosol sprays, and cooking methods that create a lot of smoke or fine particles.

Vacuuming can also stir up particles. EPA guidance recommends avoiding vacuuming during smoke events unless the vacuum uses a HEPA filter.

5. Keep the Home Cool and Fresh Water Available

Wildfire smoke and summer heat can occur at the same time. During hot weather, make sure your cat has easy access to a comfortable indoor area and clean, fresh water.

Multiple water-access points can also be useful in larger homes or for cats that spend time in different rooms throughout the day. The important part is making fresh water easy to find and consistently available.

A cat near fresh drinking water in a cool indoor space during hot smoky weather.

Learn more: How to Encourage Your Cat to Drink More Water at Home

6. Pay Attention to Changes in Your Cat

Cats cannot tell us when smoky air is bothering them, so changes in breathing, energy, appetite, or eye and nasal comfort deserve attention.

Contact a veterinarian if your cat develops signs such as coughing or gagging, red or watery eyes, unusual fatigue or weakness, reduced appetite or thirst, or changes in normal breathing.

Important: Difficulty breathing, open-mouth breathing, unusually fast or labored breathing, or increased breathing noise should be treated as urgent and evaluated by a veterinarian promptly.

A Simple Smoke-Day Checklist for Cat Homes

  • Check the local AQI and wildfire smoke conditions.
  • Keep cats indoors when outdoor air quality is poor.
  • Keep doors and windows closed during smoky periods when possible.
  • Use indoor air filtration as part of a broader air-quality routine.
  • Avoid unnecessary sources of indoor particles.
  • Keep the indoor environment cool during hot weather.
  • Provide easy access to fresh water.
  • Watch for changes in your cat’s breathing, energy, eyes, appetite, or thirst.

A More Comfortable Home Starts With Everyday Habits

Wildfire smoke is not something pet owners can control, but the environment inside the home is something we can manage more thoughtfully.

Checking outdoor conditions, reducing smoke entering the home, limiting additional indoor particles, supporting indoor air care, and keeping fresh water available can all become part of a simple routine during smoky summer days.

Thoughtful pet care starts with the everyday environment pets call home.

Sources & Further Reading

  1. U.S. Environmental Protection Agency (EPA). Reduce Your Smoke Exposure .
  2. U.S. Environmental Protection Agency (EPA). Indoor Air Filtration .
  3. AirNow.gov. Using AirNow During Wildfires .
  4. UC Davis School of Veterinary Medicine. How Toxic Is Wildfire Smoke? .
  5. Texas A&M School of Veterinary Medicine & Biomedical Sciences. Small Animal Owner Fire Awareness .
Back to Journal