What to know about the dangers of wildfire smoke and particulate matter

Wildfire smoke from Canada has clouded much of the Northeast, leaving millions of Americans exposed to unhealthy levels of particulate matter.Here’s what you need to know on the dangers of wildfire smoke and why it is so toxic to your health.What is considered a dangerous air quality level?Air quality is measured by the Environmental Protection Agency’s air quality index (AQI), which ranges from 0 to 500. A higher level indicates a greater level of pollution and health concern.Levels under 100 are generally considered safe. Unhealthy levels range from 101 to 300, where more sensitive groups may experience symptoms at lower levels. The EPA provides an interactive map to track air quality in your specific area.In New York City, levels hit over 400 in some parts this week. A value over 300 is considered hazardous, where everyone is likely to be affected from the poor breathing conditions.Some hospitals have already seen patients suffering from the poor air."We've seen a mild increase in t...