The maps offer real-time insight into where smoke is driving air quality into unhealthy or even hazardous territory.

Health officials are tracking new cases of cyclosporiasis, a foodborne infection that leads to severe gastrointestinal symptoms, including intense diarrhea.

Deadly and destructive wildfires erupt in the US each year, burning millions of acres and destroying thousands of homes. CNN is tracking the trends.

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