Each year, wildfires across the United States and Canada burn millions of acres and destroy thousands of homes and other structures. CNN is tracking the trends.

Wildfires in Canada, the United States and Mexico often send smoke throughout the continent. Smoke forecast Light Medium Heavy Source: Global Systems Laboratory, National Oceanic and Atmospheric ...

The Lucas Fire has burned 4,128 acres near the Lake-Mendocino County line and is 60% contained.

Canadian wildfires trigger mass evacuations and send smoke across the U.S., putting millions at risk from poor air quality.