In many parts of the United States, the risk of wildfires begins early spring and continues into the fall. Being prepared for fire activity is crucial if you live in a wildfire-prone area. Wildfires can be a serious threat to lives and property—and smoke pollution can affect your health. According to the Environmental Protection Agency (EPA), wildfire smoke mostly consists of fine inhalable particles known as PM2.5, which is of greatest concern to public health.

Wildfire season is getting worse, starting earlier and lasting longer. Wildfires are a part of nature’s ecosystem, but when extreme, they can be devastating to people, biodiversity and ecosystems, according to the United Nations Environment Programme. Notably, wildfires can directly impact the health and safety of millions. And, while U.S. wildfires are most common in western states, all regions should prepare for such threats, as wildfires’ impact extends beyond the immediate threat to individuals and communities.