Smoke Exposure — What It Means and What to Do

Smoke from a structure, industrial, or vehicle fire can carry fine particulate matter and, depending on what is burning, a range of chemical byproducts. People nearby — especially children, older adults, and those with respiratory or heart conditions — can be affected even at some distance from the fire itself.

Common exposure concerns

Fine particulate matter (PM2.5) is the most common concern and can irritate the eyes, throat, and lungs. When industrial materials or plastics burn, smoke may also contain other irritants. Air-quality agencies publish real-time readings during these events.

What to do

Follow official guidance first. Limit outdoor activity while air quality is poor, keep indoor air as clean as possible, and seek medical attention for breathing difficulty. Document what you experienced — see our guide on documenting your exposure after an incident. To check whether your area is affected, use the area-lookup tool.

Authoritative references

For air-quality guidance, AirNow (EPA) and regional air districts such as the South Coast AQMD publish real-time data and health recommendations. We cite the specific sources relevant to each incident on that incident's page.