Cancer Treatment

Wildfire smoke lingers over the hill of the Pacific Northwest.

How Patients Can Protect Their Health During Poor Air Quality in the Pacific Northwest

Posted: August 27, 2026
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Wildfire season has become an increasingly common reality across the Pacific Northwest. While smoky skies can affect everyone, cancer patients—especially those undergoing active treatment or with compromised immune systems—face heightened risks. Understanding how wildfire smoke impacts your health and taking proactive steps can help you stay safe during periods of poor air quality.

 

Why Wildfire Smoke Matters for Cancer Patients

Wildfire smoke contains microscopic particles (PM2.5) and gases that can penetrate deep into the lungs and even enter the bloodstream. These particles can irritate the respiratory system, worsen existing conditions, and increase the risk of complications such as shortness of breath, inflammation, and fatigue.

For cancer patients, these risks are amplified. Treatments like chemotherapy, radiation therapy, and immunotherapy can weaken the immune system and reduce lung function. Even moderate air quality levels may pose concerns, and experts recommend extra caution beyond general public guidelines.

 

Key Precautions to Take During Smoky Conditions

  1. Stay Indoors and Limit Exposure - When air quality declines, your first line of defense is minimizing exposure. Even short periods of exposure can trigger symptoms, so reducing time outside is essential.
  • Stay indoors as much as possible when smoke levels are elevated
  • Keep windows and doors closed
  • Avoid outdoor exercise or strenuous activity
  1. Create a Cleaner Indoor Environment - Improving indoor air quality is critical during wildfire events.
  • Use a high-efficiency (MERV 13 or higher) HVAC filter if available
  • Run your HVAC system on “recirculate” to prevent outside air from entering
  • Consider a portable HEPA air purifier for key living spaces
  • Avoid activities that add indoor pollution, such as burning candles, using fireplaces, or frying foods.
  1. Use Proper Respiratory Protection When Necessary - If you must go outside:
  • Wear a properly fitted N95 respirator
  • Avoid cloth or surgical masks, which do not filter fine particles effectively
  • Keep in mind that masks can make breathing more difficult, so patients with lung conditions should consult their care team before use.
  1. Monitor Air Quality Closely - Air quality can change rapidly during wildfire events.
  • Check the Air Quality Index (AQI) regularly
  • Limit activity when AQI reaches “Unhealthy for Sensitive Groups” (101+)
  • Take extra precautions even at moderate levels if you are undergoing treatment. Cancer patients may need to act earlier than the general population when air quality worsens.
  1. Follow Your Care Plan and Stay Connected to Your Care Team - Your oncology team understands your unique health needs.
  • Follow any existing care plans for lung or heart conditions
  • Keep medications readily available
  • Contact your provider if you experience symptoms such as persistent cough, chest tightness, or shortness of breath
  • Having a plan in place before wildfire season—including a supply of medications—can help reduce stress during an event.
  1. Be Prepared for Extended Smoke Events - Wildfire smoke can linger for days or weeks. If symptoms worsen or do not improve, seeking medical attention promptly is important.
  • Plan indoor alternatives for exercise and daily routines
  • Keep extra air filters and supplies on hand
  • Consider temporary relocation if indoor air quality cannot be maintained

 

Symptoms to Watch For

Pay attention to how your body responds during smoky conditions. Contact your care team if you experience:

  • Persistent coughing or wheezing
  • Shortness of breath
  • Chest pain or tightness
  • Unusual fatigue or dizziness

Wildfire smoke can exacerbate existing conditions and lead to serious complications if not addressed.

 

Supporting Your Health During Wildfire Season

At Cancer Care Northwest, your health and safety remain our top priorities. While wildfire smoke presents additional challenges, taking proactive steps can significantly reduce your risk. By staying informed, limiting exposure, and working closely with your care team, you can continue your cancer care safely—even during periods of poor air quality.

If you have questions or concerns about how wildfire smoke may affect your treatment or symptoms, we encourage you to reach out to your CCNW care team.

 

Sources: Centers for Disease Control and Prevention (CDC), Washington State Department of Health, Environmental Protection Agency (EPA)