Southern California residents face a recurring health challenge each fire season: wildfire smoke. From Los Angeles to San Diego, Orange County, and the Inland Empire, smoke affects millions of people. During major fires, air quality can drop to hazardous levels within hours. This creates real health risks, especially for those with breathing or heart conditions.

Knowing how smoke affects your body helps you make better care decisions. Learning to spot symptoms that need medical attention can protect your health. Individual symptoms and responses vary based on age, health conditions, and how long you were exposed to smoke.¹

This guide covers smoke health effects, who faces the greatest risks, and when to seek medical care. When you’re a Sollis Health member, the answers to these questions are a phone call away. Sollis members have access to three beautiful private centers in Southern California, located in Beverly Hills, Santa Monica, and Manhattan Beach. When they need urgent and emergency medical attention, Sollis members receive immediate access to board-certified emergency physicians over the phone, virtually, or in person—keeping them out of the ER 99% of the time. 

Why SoCal Wildfire Smoke Is Dangerous to Your Health

Wildfire smoke contains tiny particles called particulate matter. The most harmful particulate matter is called PM2.5. These particles are 2.5 microns or smaller, about 30 times thinner than a human hair. Because they are so small, they can reach deep into your lungs. Some particles can even enter your bloodstream.²

Research suggests wildfire smoke may harm your lungs more than other types of air pollution. A study found that hospital visits for breathing problems rose by as much as 10% when wildfire PM2.5 increased by 10 μg/m³. Other pollution sources of PM2.5 caused only 0.67% to 1.3% of respiratory-related hospital visits.³

Wildfire smoke differs from regular city air pollution. Burning trees, homes, and other items creates a mix of gases and particles. These can cause health effects right away or days later. The CDC notes that smoke can travel hundreds of miles. You can be affected even if you live far from the fire.

Both your lungs and heart respond to smoke. The tiny particles cause swelling in your airways. This leads to coughing, wheezing, and trouble breathing. Some studies show smoke can also affect your blood vessels and heart rhythm.⁹

Most people experience relief from acute symptoms like cough, irritation, and shortness of breath within a few days after smoke clears. However, emerging research shows underlying cardiorespiratory effects may persist for weeks to months, particularly in individuals with pre-existing lung or heart conditions. Some people exposed to intensive, prolonged smoke may experience measurable changes in lung function for one to two years.¹⁰

Delayed symptom onset is not uncommon. Some people feel effects right away, while others notice symptoms 24 to 72 hours later. This means you may be exposed while still feeling fine. Monitor air quality daily throughout the smoke event and for several days after. People with asthma, COPD, or heart disease may experience delayed responses beyond 48 hours, warranting continued vigilance.

Recognizing Wildfire Smoke Symptoms in Southern California

Wildfire smoke causes many symptoms that range from mild to severe. The CDC lists common signs: headache, eye irritation, trouble breathing, cough, wheezing, chest pain, fast heartbeat, and tiredness.1

Breathing symptoms often show up first. You may have a dry cough that will not go away, wheezing, or chest tightness. Shortness of breath during normal activities means smoke is affecting your airways. Throat irritation is common even with light smoke exposure.

Heart-related symptoms need close attention. The Environmental Protection Agency notes that people with heart disease who breathe in fine particle pollution, which includes wildfire smoke, could experience chest pain or tightness, a fast or irregular heartbeat (palpitations), unusual fatigue, and shortness of breath.¹¹ 

If you have a history of heart disease, diabetes, high blood pressure, or high cholesterol, inform your doctor of smoke exposure. Wildfire PM2.5 is linked to acute coronary syndrome, arrhythmia, and heart failure flare-ups. Do not delay seeking care if you experience chest pressure, palpitations, or unusual fatigue during or after smoke events.

Eye irritation, headaches, and fatigue are also common. Many people feel a burning in their eyes, more tearing, or trouble wearing contact lenses when the air is smoky.

Understanding symptom severity helps you decide what to do:

 Pay attention to how your symptoms change over time. Mild symptoms that get worse need medical attention. If you start with just eye irritation but then develop chest tightness or trouble breathing, the situation has become more serious. Track your symptoms so you can give your doctor a clear picture of what happened.

If you have asthma, smoke can make it worse. You may cough more, wheeze more, and need your rescue inhaler more often. CDC data from 2023 showed 17% more asthma ER visits during heavy smoke days.⁵

Who Is Most at Risk from Wildfire Smoke in Southern California

Wildfire smoke affects everyone, but some groups face higher risks. The EPA lists several groups that are more likely to have health problems from smoke.⁶

Children are at high risk. Their lungs are still growing. They breathe more air for their body size than adults. Kids also spend more time playing outside, which increases their exposure. During big wildfire smoke events, more people with asthma end up in the ER, including kids, as smoky air can trigger asthma attacks.5 Young children may not know how to tell you they feel bad. Watch for signs like fast breathing, flared nostrils, or skin pulling in between their ribs when they breathe.

Adults over 65 face greater risks. Many have heart or lung conditions already. Lung function also drops as we age. This age group makes up a large share of smoke-related hospital visits.

Pregnant women need to be careful. Limited evidence suggests smoke during pregnancy may raise the risk of early birth and lower birth weight.⁷ One review found support for these links, especially when exposure happened late in pregnancy.⁸ If you are pregnant, talk to your doctor about how to protect yourself.

People with asthma, COPD, heart disease, or diabetes face much higher risks. Smoke can trigger flare-ups of these conditions. This leads to more medication use, ER visits, and hospital stays.⁴

Outdoor workers face extended exposure. This includes people in construction, landscaping, farming, and delivery jobs. They often cannot avoid being outside during smoky days. Cal/OSHA has rules to protect workers when air quality is poor.

How you respond to smoke varies a lot. Even healthy people may have symptoms during heavy smoke events. Your fitness level, how much time you spend outside, and how hard you are working all play a role.

When to Seek Emergency Care for Smoke Exposure in Southern California

Some symptoms need emergency care right away. Call 911 if you have:

• Severe trouble breathing or cannot catch your breath

• Chest pain or pressure, especially if it spreads to your arm, jaw, or back

• Confusion, trouble staying awake, or trouble speaking

• Blue color on your lips, face, or fingernails

See a doctor soon if you have: a cough that keeps you from sleeping, breathing trouble that does not get better with rest, or symptoms that get worse even when you stay inside.

If you have heart disease, asthma, COPD, or diabetes, get checked for any worrying symptoms. Do not wait for them to get severe. Individual responses to smoke vary, and early treatment often stops bigger problems.

Standard healthcare settings have limits during smoke events. Hospital ERs may have long waits as more patients come in. Wait times can reach six hours or more. Typical urgent care centers may not have the equipment or physician expertise to fully evaluate heart and lung symptoms.

Your primary care physician plays a key role in follow-up care, especially if you have ongoing health conditions that worsened from smoke exposure. But most primary care offices cannot offer same-day visits or extended hours during emergencies.

Sollis Health offers a different option for members who need expert care fast. Our board-certified emergency physicians can evaluate and treat breathing and heart symptoms on-site, filling the gap between urgent care and the ER with care that’s immediate and stress-free. We partner with your other medical providers, coordinating with your primary care physician. If you need  specialist care, we can provide referrals to top doctors in your area in days, not weeks. Learn more about our membership options or find a Sollis center near you.

How to Protect Yourself from Wildfire Smoke in Southern California

Several strategies can reduce your smoke exposure and protect your health during fire season:

• Stay inside with windows and doors closed. If you have AC, set it to recirculate so it does not pull smoky air from outside. Close any fresh-air intakes on your HVAC system.

• Use HEPA air filters. They can lower indoor smoke levels significantly. How well they work depends on your room size, filter quality, and how well your home keeps out outdoor air.6 Put a portable air cleaner in the room where you spend the most time, like your bedroom.

• Wear N95 masks outside. They protect you when you must go outside, but only if they fit right. Regular cloth or surgical masks do not filter smoke particles. Look for NIOSH-approved N95 masks and make sure the mask seals tight to your face with no gaps.

• Check air quality regularly. Visit AirNow.gov or the EPA Fire and Smoke Map for real-time PM2.5 readings and forecasts to help you plan your day.

• Create a clean air room. Pick a room with few windows. Seal gaps around doors and windows. Run a HEPA air purifier all the time. The bedroom often works well since you spend many hours there sleeping.

• Avoid adding to indoor pollution. Do not burn candles or use gas stoves without venting. Avoid vacuuming unless you have a HEPA filter. Do not smoke indoors. Keep activity light so you breathe slower and less deeply.

• Stock up before fire season. Keep extra air filters on hand. Have a supply of N95 masks that fit you well. Make sure you have enough medicines to last two weeks.

• Know when to keep children home. If air quality reaches Unhealthy for Sensitive Groups (AQI 101-150) and your child has asthma, respiratory symptoms, or outdoor activities are planned, consider keeping them home. At AQI 151 or higher, many schools issue closures. Check local guidance.

• Outdoor workers: discuss modifications with your employer. If you work outdoors and AQI exceeds 100, ask about indoor tasks, earlier or later hours, or respirator provision per Cal/OSHA requirements.

The Air Quality Index (AQI) uses a standard scale:

 Get Immediate Expert Evaluation for Wildfire Smoke Exposure

Know your symptoms. Know your risk factors. Get care when you need it. Do not ignore symptoms that last or get worse, especially if you have health conditions. Taking action early often leads to better outcomes. You know your body best, so trust yourself when something feels wrong.

Continuity of care matters. Make sure any urgent evaluation is shared with your primary care physician for ongoing management. This is especially important if you have chronic lung or heart conditions. If you do not currently have a concierge primary care provider, Sollis Health can recommend trusted local partners and even provide priority referrals for members.

Sollis Health gives members across Southern California fast access to emergency medicine physicians at our Beverly Hills, Santa Monica, and Manhattan Beach centers. Our board-certified doctors come from top institutions likeCedars-Sinai, UCLA, Mount Sinai, and Stanford. Our centers offer no-wait care, imaging and lab tests on-site, and the expertise to treat smoke-related respiratory and cardiovascular symptoms without delay or confusion. We are open 24/7/365, so members can get care any time symptoms arise—keeping them away from emergency room chaos 99% of the time.

Our VIP concierge team handles everything from follow-up visits to specialist referrals. This keeps your care connected with your primary care doctor and other providers. Explore membership or contact our team to learn how Sollis can become your first call for urgent and emergency medical needs.

Frequently Asked Questions

How long do wildfire smoke symptoms last?

Most healthy adults experience relief from acute symptoms like cough, irritation, and shortness of breath within a few days after the smoke clears. However, emerging research shows underlying cardiorespiratory effects may persist for weeks to months. People with existing lung or heart conditions may have longer recovery times. If symptoms last more than one to two weeks after air quality improves, see a doctor.

Can wildfire smoke cause permanent lung damage?

Short-term exposure usually does not cause lasting damage in healthy people. But research suggests that repeated or long-term exposure may change lung function over time.⁴ People with existing lung conditions may have more lasting effects. Scientists are still learning about the long-term impacts of wildfire smoke.

Is wildfire smoke more dangerous than regular air pollution?

Research suggests wildfire smoke may harm your lungs more than other types of PM2.5. One Southern California study found hospital visits for breathing problems rose more from wildfire smoke than from other pollution.³ But both types pose health risks. Take steps to protect yourself whenever air quality is poor.

Do air purifiers help with wildfire smoke?

HEPA air purifiers can lower indoor PM2.5 levels significantly. They work best if you pick one size for your room, seal the room well from outdoor air, and run it all the time during smoke events. Look for verified HEPA filters and check the Clean Air Delivery Rate (CADR) to match your room size.

Is it safe to exercise during smoky conditions?

Exercise makes you breathe faster and deeper, pulling more polluted air into your lungs. The EPA says to cut back on outdoor exercise when AQI goes above 100. Everyone should avoid outdoor activity when AQI exceeds 150.6 Move workouts indoors to gyms with good air filters, or wait until the air clears.

When is it safe to go outside after smoke clears?

Check AirNow.gov for real-time readings instead of just looking at the sky. Smoke can linger even when it looks clear. What you see does not always match PM2.5 levels. Wait until AQI drops to Good (0-50) or Moderate (51-100) before going back to normal outdoor activities.

Should I take my child to the doctor for smoke exposure?

See a doctor if your child has a cough that will not stop, wheezing, trouble breathing, or symptoms that keep them from sleeping or playing normally. Kids with asthma and their caregivers should review their action plan before fire season. Get care quickly for any asthma flare-up. Healthy kids with only mild symptoms like a slight cough usually get better on their own once the smoke clears.

What should I do if I have asthma during a wildfire?

Talk to your doctor about your asthma plan before fire season if you can. Keep rescue inhalers handy and make sure prescriptions are current and unexpired. Stay inside when AQI goes above 100. If you notice more symptoms, need your inhaler more often, or your usual medicines are not working, see a doctor. Do not wait until symptoms get severe.

 

References

1. Centers for Disease Control and Prevention. Health Alert Network Advisory: Wildfire Smoke Exposure Poses Threat to At-Risk Populations. HAN-00495. 2023. https://www.cdc.gov/han/2023/han00495.html

2. U.S. Environmental Protection Agency. Wildland Fires and Smoke. EPA.gov. 2025. https://www.epa.gov/air-quality/wildland-fires-and-smoke

3. Aguilera R, et al. Wildfire smoke impacts respiratory health more than fine particles from other sources: observational evidence from Southern California. Nature Communications. 2021;12:1493. https://www.nature.com/articles/s41467-021-21708-0

4. Wilgus ML, Merchant M. Clearing the Air: Understanding the Impact of Wildfire Smoke on Asthma and COPD. Healthcare (Basel). 2024;12(3):307. https://pubmed.ncbi.nlm.nih.gov/38338192/

5. CDC MMWR. Asthma-Associated Emergency Department Visits During the Canadian Wildfire Smoke Episodes, United States, April-August 2023. 2023;72(34):909-915. https://www.cdc.gov/mmwr/volumes/72/wr/mm7234a5.htm

6. U.S. Environmental Protection Agency. Which Populations Experience Greater Risks of Adverse Health Effects Resulting from Wildfire Smoke Exposure? Wildfire Smoke Course. 2025. https://19january2021snapshot.epa.gov/wildfire-smoke-course/which-populations-experience-greater-risks-adverse-health-effects-resulting_.html

7. Picciotto S, et al. Associations between wildfire smoke exposure during pregnancy and risk of preterm birth in California. Environment International. 2024;186:108564. https://pubmed.ncbi.nlm.nih.gov/38521046/

8. Amjad S, et al. Wildfire exposure during pregnancy and the risk of adverse birth outcomes: A systematic review. Environment International. 2021;156:106644. https://pubmed.ncbi.nlm.nih.gov/34030071/

9. Vuorio, A., Budowle, B., Raal, F., & Kovanen, P. T. (2023). Wildfire smoke exposure and cardiovascular disease-should statins be recommended to prevent cardiovascular events?. Frontiers in cardiovascular medicine, 10, 1259162. https://doi.org/10.3389/fcvm.2023.1259162

10. Orr, A., A L Migliaccio, C., Buford, M., Ballou, S., & Migliaccio, C. T. (2020). Sustained Effects on Lung Function in Community Members Following Exposure to Hazardous PM2.5 Levels from Wildfire Smoke. Toxics, 8(3), 53. https://doi.org/10.3390/toxics8030053

11. U.S. Environmental Protection Agency. Air Pollution and Cardiovascular Disease Basics. EPA.gov. 2025. https://www.epa.gov/air-research/air-pollution-and-cardiovascular-disease-basics